MediaBrowserServiceCompat: Make SubscriptionCallback.onError be called

When an error occurs during subscription, make SubscriptionCallback.onError()
be called properly. Also enables related tests.

Bug: 34068637, Bug: 34069800
Test: ./gradlew support-media-compat:connectedCheck on API 19, 23, 24 devices
Change-Id: Ib909e8481f8c2397f46cf00f62d11ee47c6fe041
(cherry picked from commit 68284cf61cf46c69e443536b350b6cab9debbcdd)
3 files changed