Revert "Convert RollbackTest Android.mk to an Android.bp."

This reverts commit 0145c883e00619a3270ca14d5e5cfdd3331fc413.

Reason for revert: Causes the RollbackTest apps to be installed to the system partition, which breaks the rollback tests.
Bug: 123695037

Change-Id: I3ee89ecb370144c67fe88bb389abafdda59dc502
2 files changed