Remove ClockworkSettingsRoboTests from androidx TEST_MAPPING am: 60dfbe8c46 am: 7412a60e7b

Original change: https://googleplex-android-review.googlesource.com/c/platform/prebuilts/sdk/+/20290148

Change-Id: I7e1ee2b00f436bdc651ef81dce1b0869d4e138bf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>