base: lockscreen rotation fix

You must not check the value of ACCELEROMETER_ROTATION here
cause this will be 0 also in the case of using 'rotation locked'
from quick settings

Change-Id: If610e86d1df6be1a60aa996450344c07f8266e5f

Changes:
	packages/Keyguard/src/com/android/keyguard/KeyguardViewManager.java