Revert "[ActivityManager] Prevent potential deadlock from system error dialog and InputMethodManager."

This reverts commit 691799630c128db119d23835a9d179d124538af9.

Team - I think these ActivityManager commits are what are causing the widget loading issues on my devices.

Change-Id: I775df9c4b16ef05a07487b88a0b5fe3af3aee3c0
Merge "Revert "[ActivityManager] Prevent potential deadlock from system error dialog and InputMethodManager."" into kitkat3