Improve widget getters

Add range annotations to ToggleButton#getDisableAlpha() and
ViewFlipper#getFlipInterval().

Rename AbsListView#getDrawSelectorOnTop() to #isDrawSelectorOnTop()

Test: m framework
Change-Id: Ieda5b45d10677a9be19a4fc61e8e25d491633428
Fix: 126391791
4 files changed