Fix a crash caused by transaction

A native transaction passed from webview is sent back to native side, so java side does not manage the life cycle of the transaction.

Bug: 191414767
Test: Play a video, switch to another app, wait for 10 seconds
Change-Id: I013052c202b445438d6cb6497f5f9a2fc22a2b85

graphics/java/android/graphics/BLASTBufferQueue.java

@@ -131,4 +131,12 @@ public final class BLASTBufferQueue {
         nativeMergeWithNextTransaction(mNativeObject, t.mNativeObject, frameNumber);
     }
 
+    /**
+     * Merge the transaction passed in to the next transaction in BlastBufferQueue.
+     * @param nativeTransaction native handle passed from native c/c++ code.
+     */
+    public void mergeWithNextTransaction(long nativeTransaction, long frameNumber) {
+        nativeMergeWithNextTransaction(mNativeObject, nativeTransaction, frameNumber);
+    }
+
 }

graphics/java/android/graphics/HardwareRenderer.java

@@ -912,7 +912,7 @@ public class HardwareRenderer {
          * @param aSurfaceControlNativeObj ASurfaceControl native object handle
          * @param frame The id of the frame being drawn.
          */
-        void onMergeTransaction(long aSurfaceTranactionNativeObj,
+        boolean onMergeTransaction(long aSurfaceTranactionNativeObj,
                                 long aSurfaceControlNativeObj, long frame);
     }