[framweweworks] clean up broadcast receivers after test am: f036bb66

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24834211



Change-Id: I2177917d09dcf23790c37e3873bd864c375e3d8d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>