Revert "Notification Shade: add boost hints to onTouchEvent override"

This reverts commit 29abfa4778f568da127ac0be789c2e1769cdd62e.
core: fix volume panel more button transparency

Change-Id: I9f728256efbaf138611822079ea7737cd345bb19
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>