Add battery level around unlock ring (1/2)

Change-Id: I8447e76b31c6ef00084c6c1b421f75a2e73f911b

Conflicts:
	core/java/android/provider/Settings.java
	policy/src/com/android/internal/policy/impl/keyguard/KeyguardSelectorView.java
Add transparency settings for lockscreen (1/2)

This will enable the user to set the transparency level
for the lockscreen.

Change-Id: I624b2e136432bb0effceac9f7d41c78c65d22125
Signed-off-by: Dirk Rettschlag <dirk.rettschlag@gmail.com>

Conflicts:
	core/java/android/provider/Settings.java
	policy/src/com/android/internal/policy/impl/keyguard/KeyguardViewBase.java