Invoke keyguard going away when it is collecting for wake

Before, when KEYGUARD_GOING_AWAY is called before WAKE starts,it will
not be passed to the keyguard service to dimiss keyguard. Now, we
merge the flags and add check for that.

Bug: 193564917
Test: check with/without sEnableRemoteKeyguardAnimation
Change-Id: I28d40664b4fbdc0ea199baa32ccefba7dea473f8