MediaSession2: Add/remove playback listeners

Test: Run all MediaComponents test once
Change-Id: Ic24a67cbbead7a9d4d420fc03c8004cbd04f61b9
diff --git a/packages/MediaComponents/test/runtest.sh b/packages/MediaComponents/test/runtest.sh
index d0290e7..920fa96 100644
--- a/packages/MediaComponents/test/runtest.sh
+++ b/packages/MediaComponents/test/runtest.sh
@@ -134,7 +134,7 @@
       ${adb} shell start
       ${adb} wait-for-device || break
       # Ensure package manager is loaded.
-      sleep 5
+      sleep 15
 
       # Install apks
       local install_failed="false"