Some build fixes
This includes a couple of fixes discussed with @mvdan including removing the ANDROID_NDK_HOME
env var from the buildserver and removing the default behavior to force the build-tools version.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
This includes a couple of fixes discussed with @mvdan including removing the ANDROID_NDK_HOME
env var from the buildserver and removing the default behavior to force the build-tools version.