Remove IME surface when hidden

When IME is no longer shown, notify IMS to hide the window surface.
This reclaims the memory allocated to IME window surface.

Fix: 150163310
Test: atest CtsInputMethodTests
      Manually:
      1. Open any app that has editor  and run
         adb shell  dumpsys SurfaceFlinger | grep Total
      2. Note down total memory
      3. Tap on editor and IME shows. Note down memory
         using command in #1. It should go up by ~27MB
      4. Hide IME and note down memory again.
         It should revert to original value in #1.

Change-Id: I6c2a13dd40b22d3fd62b4763ba369992e5ff1138

1 files changed, 11 insertions, 2 deletions

diff --git a/core/java/android/view/InsetsSourceConsumer.java b/core/java/android/view/InsetsSourceConsumer.java
index e6497c00c8dd..e3a7de126df3 100644
--- a/core/java/android/view/InsetsSourceConsumer.java
+++ b/core/java/android/view/InsetsSourceConsumer.java
@@ -16,12 +16,10 @@
 
 package android.view;
 
-import static android.view.InsetsController.ANIMATION_TYPE_NONE;
 import static android.view.InsetsState.toPublicType;
 
 import android.annotation.IntDef;
 import android.annotation.Nullable;
-import android.util.MutableShort;
 import android.view.InsetsState.InternalInsetsType;
 import android.view.SurfaceControl.Transaction;
 import android.view.WindowInsets.Type.InsetsType;
@@ -137,6 +135,10 @@ public class InsetsSourceConsumer {
         setRequestedVisible(false);
     }
 
+    void hide(boolean animationFinished) {
+        hide();
+    }
+
     /**
      * Called when current window gains focus
      */
@@ -201,6 +203,13 @@ public class InsetsSourceConsumer {
     }
 
     /**
+     * Remove surface on which this consumer type is drawn.
+     */
+    public void removeSurface() {
+        // no-op for types that always return ShowResult#SHOW_IMMEDIATELY.
+    }
+
+    /**
      * Sets requested visibility from the client, regardless of whether we are able to control it at
      * the moment.
      */