android.policy: Fix launching home when waking the device with the home button again

Was removed in b055725d0b1df2f23ecfa95bff940aa8b57f97df

Change-Id: I19b5db8e64d7e547f4013ab8df7ff879d1a51167

Conflicts:
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java