Set TvBottomSheetActivity as unrestricted keep-clear area

This makes the Tv Pip move away from the dialog in order to not cover
its content

Bug: 227596282
Test: manual: start activity in Pip; start Duo and send:
      adb shell cmd sensor_privacy enable 0 microphone && \
      adb shell appops start com.google.android.apps.tachyon 27
Change-Id: Ifb0a11cc6c09b2b088d8a28c6016b831f5c57ac9

data/etc/com.android.systemui.xml

@@ -80,5 +80,6 @@
         <permission name="android.permission.READ_COMPAT_CHANGE_CONFIG" />
         <permission name="android.permission.READ_DEVICE_CONFIG" />
         <permission name="android.permission.READ_SAFETY_CENTER_STATUS" />
+        <permission name="android.permission.SET_UNRESTRICTED_KEEP_CLEAR_AREAS" />
     </privapp-permissions>
 </permissions>

packages/SystemUI/AndroidManifest.xml

@@ -323,6 +323,8 @@
     <!-- To read safety center status -->
     <uses-permission android:name="android.permission.READ_SAFETY_CENTER_STATUS" />
 
+    <uses-permission android:name="android.permission.SET_UNRESTRICTED_KEEP_CLEAR_AREAS" />
+
     <protected-broadcast android:name="com.android.settingslib.action.REGISTER_SLICE_RECEIVER" />
     <protected-broadcast android:name="com.android.settingslib.action.UNREGISTER_SLICE_RECEIVER" />
     <protected-broadcast android:name="com.android.settings.flashlight.action.FLASHLIGHT_CHANGED" />

packages/SystemUI/src/com/android/systemui/tv/TvBottomSheetActivity.java

@@ -18,15 +18,18 @@ package com.android.systemui.tv;
 
 import android.app.Activity;
 import android.graphics.PixelFormat;
+import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
 import android.os.Bundle;
 import android.util.DisplayMetrics;
 import android.util.Log;
 import android.view.Gravity;
+import android.view.View;
 import android.view.WindowManager;
 
 import com.android.systemui.R;
 
+import java.util.Collections;
 import java.util.function.Consumer;
 
 /**
@@ -75,6 +78,12 @@ public abstract class TvBottomSheetActivity extends Activity {
         getWindow().setElevation(getWindow().getElevation() + 5);
         getWindow().setBackgroundBlurRadius(getResources().getDimensionPixelSize(
                 R.dimen.bottom_sheet_background_blur_radius));
+
+        final View rootView = findViewById(R.id.bottom_sheet);
+        rootView.addOnLayoutChangeListener((view, l, t, r, b, oldL, oldT, oldR, oldB) -> {
+            rootView.setUnrestrictedPreferKeepClearRects(
+                    Collections.singletonList(new Rect(0, 0, r - l, b - t)));
+        });
     }
 
     @Override