Add mechanism for a task's windows to be trusted overlays

- Exposes a method to set that a certain part of the SF hierarchy is
  trusted, and sets this state for tasks in PIP.

Bug: 191529039
Test: Manual, try using permission dialog while PIP is active

Change-Id: I170cb5a7d22ef569eb36de21cc0bcbef60dd385e

1 files changed, 13 insertions, 0 deletions

diff --git a/core/java/android/view/SurfaceControl.java b/core/java/android/view/SurfaceControl.java
index 4e2f37fde1f7..8143cf953f19 100644
--- a/core/java/android/view/SurfaceControl.java
+++ b/core/java/android/view/SurfaceControl.java
@@ -148,6 +148,8 @@ public final class SurfaceControl implements Parcelable {
             float width, float height, float vecX, float vecY,
             float maxStretchAmountX, float maxStretchAmountY, float childRelativeLeft,
             float childRelativeTop, float childRelativeRight, float childRelativeBottom);
+    private static native void nativeSetTrustedOverlay(long transactionObj, long nativeObject,
+            boolean isTrustedOverlay);
 
     private static native boolean nativeClearContentFrameStats(long nativeObject);
     private static native boolean nativeGetContentFrameStats(long nativeObject, WindowContentFrameStats outStats);
@@ -3413,6 +3415,17 @@ public final class SurfaceControl implements Parcelable {
             return this;
         }
 
+        /**
+         * Sets the trusted overlay state on this SurfaceControl and it is inherited to all the
+         * children. The caller must hold the ACCESS_SURFACE_FLINGER permission.
+         * @hide
+         */
+        public Transaction setTrustedOverlay(SurfaceControl sc, boolean isTrustedOverlay) {
+            checkPreconditions(sc);
+            nativeSetTrustedOverlay(mNativeObject, sc.mNativeObject, isTrustedOverlay);
+            return this;
+        }
+
          /**
          * Merge the other transaction into this transaction, clearing the
          * other transaction as if it had been applied.