Bind DropPermissions life cycle to Activity

Move requestDropPermissions from DragEvent to Activity.
Permissions will be granted using UriPermissionOwner
 associated with this activity and revoked when the activity
 is destroyed (if DropPermissions.release is not called before that).

Change-Id: Ic8f8fc3f56f57e83b9bc34ae8c96d82c2c9c4e1d
diff --git a/core/java/android/app/ActivityManagerNative.java b/core/java/android/app/ActivityManagerNative.java
index 1b08273..3a3aa92 100644
--- a/core/java/android/app/ActivityManagerNative.java
+++ b/core/java/android/app/ActivityManagerNative.java
@@ -1845,6 +1845,15 @@
             return true;
         }
 
+        case GET_URI_PERMISSION_OWNER_FOR_ACTIVITY_TRANSACTION: {
+            data.enforceInterface(IActivityManager.descriptor);
+            IBinder activityToken = data.readStrongBinder();
+            IBinder perm = getUriPermissionOwnerForActivity(activityToken);
+            reply.writeNoException();
+            reply.writeStrongBinder(perm);
+            return true;
+        }
+
         case GRANT_URI_PERMISSION_FROM_OWNER_TRANSACTION: {
             data.enforceInterface(IActivityManager.descriptor);
             IBinder owner = data.readStrongBinder();
@@ -5121,6 +5130,19 @@
         return res;
     }
 
+    public IBinder getUriPermissionOwnerForActivity(IBinder activityToken) throws RemoteException {
+        Parcel data = Parcel.obtain();
+        Parcel reply = Parcel.obtain();
+        data.writeInterfaceToken(IActivityManager.descriptor);
+        data.writeStrongBinder(activityToken);
+        mRemote.transact(GET_URI_PERMISSION_OWNER_FOR_ACTIVITY_TRANSACTION, data, reply, 0);
+        reply.readException();
+        IBinder res = reply.readStrongBinder();
+        data.recycle();
+        reply.recycle();
+        return res;
+    }
+
     public void grantUriPermissionFromOwner(IBinder owner, int fromUid, String targetPkg,
             Uri uri, int mode, int sourceUserId, int targetUserId) throws RemoteException {
         Parcel data = Parcel.obtain();