Fix AssistDataRequesterTest Flakiness

There's a race condition between setting `mRequestCompleted = true`
and asserts its value as true in #assertReceivedDataCount.

Fix the flakiness by updating `mRequestCompleted` whenever getting
the callback (without handling it asynchronously).

Bug: 280107567
Bug: 296229082
Test: run the test over 200 times
Change-Id: I04dfa87c762fd9ee7dfcb9d5dd5982780f43356c
Merged-In: I04dfa87c762fd9ee7dfcb9d5dd5982780f43356c
(cherry picked from commit 6c1126780d45c62b73c170523ccf539030fbdf84)
diff --git a/services/tests/wmtests/src/com/android/server/wm/AssistDataRequesterTest.java b/services/tests/wmtests/src/com/android/server/wm/AssistDataRequesterTest.java
index 7b4392b..56c3ec0 100644
--- a/services/tests/wmtests/src/com/android/server/wm/AssistDataRequesterTest.java
+++ b/services/tests/wmtests/src/com/android/server/wm/AssistDataRequesterTest.java
@@ -317,7 +317,8 @@
         assertEquals("Expected " + numPendingScreenshots + " pending screenshots, got "
                         + mDataRequester.getPendingScreenshotCount(),
                 numPendingScreenshots, mDataRequester.getPendingScreenshotCount());
-        assertFalse("Expected request NOT completed", mCallbacks.mRequestCompleted);
+        assertEquals("Expected request NOT completed, unless no pending data",
+                numPendingData == 0 && numPendingScreenshots == 0, mCallbacks.mRequestCompleted);
         mGate.countDown();
         waitForIdle(mHandler);
         assertEquals("Expected " + numReceivedData + " data, received "
@@ -376,14 +377,7 @@
 
         @Override
         public void onAssistRequestCompleted() {
-            mHandler.post(() -> {
-                try {
-                    mGate.await(10, TimeUnit.SECONDS);
-                    mRequestCompleted = true;
-                } catch (InterruptedException e) {
-                    Log.e(TAG, "Failed to wait", e);
-                }
-            });
+            mRequestCompleted = true;
         }
     }
 }