Revert "Freeze all package processes before killing"

This reverts commit a666f83b825d4017751bd2c6d1e81763d53690eb.

Reason for revert: b/236266655 zygote for a new process spawns in different process group before moving, which causes permanent freeze of all zygote processes.

Change-Id: I5eae2519e6bcb52e8ee4a7e0bf5dc8495258b732
1 file changed