Fix potential race condition problem

If we call forceSuspend to enter STR and then resume from it,
we should make sure that mForceSuspendActive is set to false
to wake up device correctly.

Bug: 205257123
Test: 1. forceSuspend
      2. wait until kernel enter suspend mode
      3. press power button to wakeUp
Change-Id: I3c57ff7c7352fe078f2139d9679dc3d860482f05