Remove Android.mk which is unused.

This file should have been removed in aosp/3042775 since it is not included by device/google/atv/Android.mk and it is not used even before device/google/atv/Android.mk is removed.

Bug: 309884347
Test: CIs
Change-Id: I748d12b5afb8f91d7fdfd090bbef37ffb82f5124
1 file changed