[Media TTT] Displayed View Keeps Screen On

This CL ensures that the screen is kept on when the chipbar is
displayed. It acquires a wakelock with different levels and flags when
the screen is already on. This doesn't affect the screensaver mode.

Bug: 241929425.
Test: Ran adb commands when the screen is already on, and made sure that
the screen goes off after the view is removed. This was tested on
a phone and tablet devices.
Test: atest MediaTttChipControllerReceiver.
Test: atest TemporaryViewDisplayControllerTest.
Test: atest MediaTttSenderCoordinatorTest.

Change-Id: I2c471c435d297c074ee792c06c80112de24ac5f2

packages/SystemUI/src/com/android/systemui/temporarydisplay/TemporaryViewDisplayController.kt

@@ -65,8 +65,7 @@ abstract class TemporaryViewDisplayController<T : TemporaryViewInfo, U : Tempora
         height = WindowManager.LayoutParams.WRAP_CONTENT
         type = WindowManager.LayoutParams.TYPE_SYSTEM_ERROR
         flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE or
-            WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL or
-            WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON
+            WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
         format = PixelFormat.TRANSLUCENT
         setTrustedOverlay()
     }
@@ -120,20 +119,27 @@ abstract class TemporaryViewDisplayController<T : TemporaryViewInfo, U : Tempora
             // At this point, we're guaranteed to no longer be displaying a view.
             // So, set up all our callbacks and inflate the view.
             configurationController.addCallback(displayScaleListener)
-            // Wake the screen if necessary so the user will see the view. (Per b/239426653, we want
-            // the view to show over the dream state, so we should only wake up if the screen is
-            // completely off.)
-            if (!powerManager.isScreenOn) {
-                wakeLock = wakeLockBuilder
+
+            wakeLock = if (!powerManager.isScreenOn) {
+                // If the screen is off, fully wake it so the user can see the view.
+                wakeLockBuilder
                     .setTag(newInfo.windowTitle)
                     .setLevelsAndFlags(
-                        PowerManager.FULL_WAKE_LOCK or
-                        PowerManager.ACQUIRE_CAUSES_WAKEUP
+                            PowerManager.FULL_WAKE_LOCK or
+                                PowerManager.ACQUIRE_CAUSES_WAKEUP
                     )
                     .build()
-                wakeLock?.acquire(newInfo.wakeReason)
-                wakeReasonAcquired = newInfo.wakeReason
+            } else {
+                // Per b/239426653, we want the view to show over the dream state.
+                // If the screen is on, using screen bright level will leave screen on the dream
+                // state but ensure the screen will not go off before wake lock is released.
+                wakeLockBuilder
+                    .setTag(newInfo.windowTitle)
+                    .setLevelsAndFlags(PowerManager.SCREEN_BRIGHT_WAKE_LOCK)
+                    .build()
             }
+            wakeLock?.acquire(newInfo.wakeReason)
+            wakeReasonAcquired = newInfo.wakeReason
             logger.logViewAddition(newInfo.windowTitle)
             inflateAndUpdateView(newInfo)
         }

packages/SystemUI/tests/src/com/android/systemui/temporarydisplay/TemporaryViewDisplayControllerTest.kt

@@ -123,27 +123,37 @@ class TemporaryViewDisplayControllerTest : SysuiTestCase() {
     }
 
     @Test
-    fun displayView_screenOff_wakeLockAcquired() {
+    fun displayView_wakeLockAcquired() {
         underTest.displayView(getState())
 
         assertThat(fakeWakeLock.isHeld).isTrue()
     }
 
     @Test
-    fun displayView_screenAlreadyOn_wakeLockNotAcquired() {
+    fun displayView_screenAlreadyOn_wakeLockAcquired() {
         whenever(powerManager.isScreenOn).thenReturn(true)
 
         underTest.displayView(getState())
 
+        assertThat(fakeWakeLock.isHeld).isTrue()
+    }
+
+    @Test
+    fun displayView_wakeLockCanBeReleasedAfterTimeOut() {
+        underTest.displayView(getState())
+        assertThat(fakeWakeLock.isHeld).isTrue()
+
+        fakeClock.advanceTime(TIMEOUT_MS + 1)
+
         assertThat(fakeWakeLock.isHeld).isFalse()
     }
 
     @Test
-    fun displayView_screenOff_wakeLockCanBeReleasedAfterTimeOut() {
+    fun displayView_removeView_wakeLockCanBeReleased() {
         underTest.displayView(getState())
         assertThat(fakeWakeLock.isHeld).isTrue()
 
-        fakeClock.advanceTime(TIMEOUT_MS + 1)
+        underTest.removeView("test reason")
 
         assertThat(fakeWakeLock.isHeld).isFalse()
     }