Frameworks: Add background to halo button

Change-Id: Ia6b89c78a807955621e82f22723419bd1afcf2d5

Autor: lion0738 <lion0738@naver.com>
Original Commit: https://github.com/lion0738/android_frameworks_base/commit/597d99c2d2d3cb8376fbd8bc894edca8270f8554