Check latch timeout for a test in MediaBrowserCompatTest

This CL checks the return value of CountDownLatch#await so that let us
know a hint of the reason that this test is flaky on the next line.

Bug: 74093976
Test: ./media/version-compat-tests/runtest.sh 1 on API 29 device
Change-Id: I015e6469b2ce73e83bc85bf5569930f21bf182d3

diff --git a/media/version-compat-tests/current/client/src/androidTest/java/android/support/mediacompat/client/MediaBrowserCompatTest.java b/media/version-compat-tests/current/client/src/androidTest/java/android/support/mediacompat/client/MediaBrowserCompatTest.java
index 7edaaea..e4124d7 100644
--- a/media/version-compat-tests/current/client/src/androidTest/java/android/support/mediacompat/client/MediaBrowserCompatTest.java
+++ b/media/version-compat-tests/current/client/src/androidTest/java/android/support/mediacompat/client/MediaBrowserCompatTest.java

@@ -633,7 +633,7 @@
             for (int j = i + 1; j < orderOfRemovingCallbacks.length; j++) {
                 StubSubscriptionCallback callback = subscriptionCallbacks
                         .get(orderOfRemovingCallbacks[j]);
-                callback.await(TIME_OUT_MS);
+                assertTrue(callback.await(TIME_OUT_MS));
                 assertEquals(1, callback.mChildrenLoadedWithOptionCount);
             }
 

diff --git a/media/version-compat-tests/previous/client/src/androidTest/java/android/support/mediacompat/client/MediaBrowserCompatTest.java b/media/version-compat-tests/previous/client/src/androidTest/java/android/support/mediacompat/client/MediaBrowserCompatTest.java
index bacbe5b..b0309ed 100644
--- a/media/version-compat-tests/previous/client/src/androidTest/java/android/support/mediacompat/client/MediaBrowserCompatTest.java
+++ b/media/version-compat-tests/previous/client/src/androidTest/java/android/support/mediacompat/client/MediaBrowserCompatTest.java

@@ -583,7 +583,7 @@
             for (int j = i + 1; j < orderOfRemovingCallbacks.length; j++) {
                 StubSubscriptionCallback callback = subscriptionCallbacks
                         .get(orderOfRemovingCallbacks[j]);
-                callback.await(TIME_OUT_MS);
+                assertTrue(callback.await(TIME_OUT_MS));
                 assertEquals(1, callback.mChildrenLoadedWithOptionCount);
             }