[RESTRICT AUTOMERGE] Revert "Require permission to create trusted displays"

This reverts commit f21c885ca7.

Reason for revert: Have regression b/168268396.
Needs to pull out from Nov. builds.

Bug: 162627132

Change-Id: I29fa3937d1655a0cc7591abcfa2067f4fb2b2bcb

core/java/android/app/ActivityView.java

@@ -105,8 +105,7 @@ public class ActivityView extends ViewGroup implements android.window.TaskEmbedd
     public ActivityView(
             @NonNull Context context, @NonNull AttributeSet attrs, int defStyle,
             boolean singleTaskInstance, boolean usePublicVirtualDisplay) {
-        this(context, attrs, defStyle, singleTaskInstance, usePublicVirtualDisplay,
+        this(context, attrs, defStyle, singleTaskInstance, usePublicVirtualDisplay, false);
-                false /* disableSurfaceViewBackgroundLayer */);
     }
 
     /** @hide */
@@ -114,22 +113,12 @@ public class ActivityView extends ViewGroup implements android.window.TaskEmbedd
             @NonNull Context context, @NonNull AttributeSet attrs, int defStyle,
             boolean singleTaskInstance, boolean usePublicVirtualDisplay,
             boolean disableSurfaceViewBackgroundLayer) {
-        this(context, attrs, defStyle, singleTaskInstance, usePublicVirtualDisplay,
-                disableSurfaceViewBackgroundLayer, false /* useTrustedDisplay */);
-    }
-
-    // TODO(b/162901735): Refactor ActivityView with Builder
-    /** @hide */
-    public ActivityView(
-            @NonNull Context context, @NonNull AttributeSet attrs, int defStyle,
-            boolean singleTaskInstance, boolean usePublicVirtualDisplay,
-            boolean disableSurfaceViewBackgroundLayer, boolean useTrustedDisplay) {
         super(context, attrs, defStyle);
         if (useTaskOrganizer()) {
             mTaskEmbedder = new TaskOrganizerTaskEmbedder(context, this);
         } else {
             mTaskEmbedder = new VirtualDisplayTaskEmbedder(context, this, singleTaskInstance,
-                    usePublicVirtualDisplay, useTrustedDisplay);
+                    usePublicVirtualDisplay);
         }
         mSurfaceView = new SurfaceView(context, null, 0, 0, disableSurfaceViewBackgroundLayer);
         // Since ActivityView#getAlpha has been overridden, we should use parent class's alpha

core/java/android/window/VirtualDisplayTaskEmbedder.java

@@ -19,7 +19,6 @@ package android.window;
 import static android.hardware.display.DisplayManager.VIRTUAL_DISPLAY_FLAG_DESTROY_CONTENT_ON_REMOVAL;
 import static android.hardware.display.DisplayManager.VIRTUAL_DISPLAY_FLAG_OWN_CONTENT_ONLY;
 import static android.hardware.display.DisplayManager.VIRTUAL_DISPLAY_FLAG_PUBLIC;
-import static android.hardware.display.DisplayManager.VIRTUAL_DISPLAY_FLAG_TRUSTED;
 import static android.view.Display.INVALID_DISPLAY;
 
 import android.app.ActivityManager;
@@ -64,7 +63,6 @@ public class VirtualDisplayTaskEmbedder extends TaskEmbedder {
     private int mDisplayDensityDpi;
     private final boolean mSingleTaskInstance;
     private final boolean mUsePublicVirtualDisplay;
-    private final boolean mUseTrustedDisplay;
     private VirtualDisplay mVirtualDisplay;
     private Insets mForwardedInsets;
     private DisplayMetrics mTmpDisplayMetrics;
@@ -79,12 +77,10 @@ public class VirtualDisplayTaskEmbedder extends TaskEmbedder {
      *                           only applicable if virtual displays are used
      */
     public VirtualDisplayTaskEmbedder(Context context, VirtualDisplayTaskEmbedder.Host host,
-            boolean singleTaskInstance, boolean usePublicVirtualDisplay,
+            boolean singleTaskInstance, boolean usePublicVirtualDisplay) {
-            boolean useTrustedDisplay) {
         super(context, host);
         mSingleTaskInstance = singleTaskInstance;
         mUsePublicVirtualDisplay = usePublicVirtualDisplay;
-        mUseTrustedDisplay = useTrustedDisplay;
     }
 
     /**
@@ -107,9 +103,6 @@ public class VirtualDisplayTaskEmbedder extends TaskEmbedder {
         if (mUsePublicVirtualDisplay) {
             virtualDisplayFlags |= VIRTUAL_DISPLAY_FLAG_PUBLIC;
         }
-        if (mUseTrustedDisplay) {
-            virtualDisplayFlags |= VIRTUAL_DISPLAY_FLAG_TRUSTED;
-        }
 
         mVirtualDisplay = displayManager.createVirtualDisplay(
                 DISPLAY_NAME + "@" + System.identityHashCode(this), mHost.getWidth(),

core/tests/coretests/AndroidManifest.xml

@@ -129,7 +129,6 @@
     <!-- virtual display test permissions -->
     <uses-permission android:name="android.permission.CAPTURE_VIDEO_OUTPUT" />
     <uses-permission android:name="android.permission.CAPTURE_SECURE_VIDEO_OUTPUT" />
-    <uses-permission android:name="android.permission.ADD_TRUSTED_DISPLAY" />
 
     <!-- color extraction test permissions -->
     <uses-permission android:name="android.permission.READ_FRAME_BUFFER" />

core/tests/coretests/src/android/hardware/display/VirtualDisplayTest.java

@@ -247,25 +247,6 @@ public class VirtualDisplayTest extends AndroidTestCase {
         assertDisplayUnregistered(display);
     }
 
-    /**
-     * Ensures that an application can create a trusted virtual display with the permission
-     * {@code ADD_TRUSTED_DISPLAY}.
-     */
-    public void testTrustedVirtualDisplay() throws Exception {
-        VirtualDisplay virtualDisplay = mDisplayManager.createVirtualDisplay(NAME,
-                WIDTH, HEIGHT, DENSITY, mSurface,
-                DisplayManager.VIRTUAL_DISPLAY_FLAG_TRUSTED);
-        assertNotNull("virtual display must not be null", virtualDisplay);
-
-        Display display = virtualDisplay.getDisplay();
-        try {
-            assertDisplayRegistered(display, Display.FLAG_PRIVATE | Display.FLAG_TRUSTED);
-        } finally {
-            virtualDisplay.release();
-        }
-        assertDisplayUnregistered(display);
-    }
-
     private void assertDisplayRegistered(Display display, int flags) {
         assertNotNull("display object must not be null", display);
         assertTrue("display must be valid", display.isValid());

packages/SystemUI/src/com/android/systemui/bubbles/BubbleExpandedView.java

@@ -301,7 +301,7 @@ public class BubbleExpandedView extends LinearLayout {
 
         mActivityView = new ActivityView(mContext, null /* attrs */, 0 /* defStyle */,
                 true /* singleTaskInstance */, false /* usePublicVirtualDisplay*/,
-                true /* disableSurfaceViewBackgroundLayer */, true /* useTrustedDisplay */);
+                true /* disableSurfaceViewBackgroundLayer */);
 
         // Set ActivityView's alpha value as zero, since there is no view content to be shown.
         setContentVisibility(false);

services/core/java/com/android/server/display/DisplayManagerService.java

@@ -86,7 +86,6 @@ import android.os.UserHandle;
 import android.os.UserManager;
 import android.provider.Settings;
 import android.text.TextUtils;
-import android.util.EventLog;
 import android.util.IntArray;
 import android.util.Pair;
 import android.util.Slog;
@@ -2192,16 +2191,10 @@ public final class DisplayManagerService extends SystemService {
                 }
             }
 
-            if (callingUid != Process.SYSTEM_UID && (flags & VIRTUAL_DISPLAY_FLAG_TRUSTED) != 0) {
+            if (callingUid == Process.SYSTEM_UID
-                if (!checkCallingPermission(ADD_TRUSTED_DISPLAY, "createVirtualDisplay()")) {
+                    || checkCallingPermission(ADD_TRUSTED_DISPLAY, "createVirtualDisplay()")) {
-                    EventLog.writeEvent(0x534e4554, "162627132", callingUid,
+                flags |= VIRTUAL_DISPLAY_FLAG_TRUSTED;
-                            "Attempt to create a trusted display without holding permission!");
+            } else {
-                    throw new SecurityException("Requires ADD_TRUSTED_DISPLAY permission to "
-                            + "create a trusted virtual display.");
-                }
-            }
-
-            if ((flags & VIRTUAL_DISPLAY_FLAG_TRUSTED) == 0) {
                 flags &= ~VIRTUAL_DISPLAY_FLAG_SHOULD_SHOW_SYSTEM_DECORATIONS;
             }