HALO cleanup

hdpi and mdpi drawables were inconsistent, if you plan to use HALO on
lower res devices you must reproduce them.

Change-Id: I2746837bacd60c3079ace4c7523a68b8cd415f5f

Conflicts:
	packages/SystemUI/src/com/android/systemui/statusbar/halo/Halo.java
HALO: new drawables for hdpi and mdpi

Change-Id: I531f4ae4244a389e9d6bbb6a3bc9f29447eebd50

- scaled down the xhdpi drawables properly for hdpi and mdpi
- removed some old and unused halo pngs
Fix build

Change-Id: Ie3989eba09a290b05eb0801a45d9a2f6b9c85132

OK,I think I have to change an input method