7a23b49a8c
1. Make the feature opt-in (ViewGroup::layoutMode defaults to CLIP_BOUNDS) without inheritance. 2. Rename COMPONENT_BOUNDS to CLIP_BOUNDS. 3. Rename LAYOUT_BOUNDS to OPTICAL_BOUNDS. 4. Complete GridLayout implementation. 5. Change the default_gap between components to 8dp, to align with the Style Guide. Change-Id: I8d40dfc5f4ca469f6424eb3ff60d07bec56e3a9f