Revert "Stop active MediaProjection callbacks before registering new callbacks"

This reverts commit 1bc7a32560e8b1485de98289fd35d6a3388c29e6.

Reason for revert: b/300463606 test failure blocking presubmit

Change-Id: I32a87ae52cb7ba793f93fecb18f8ac3bf229984d
2 files changed