sensorservice: Build with Clang.
(2/3) allow to configure lcd density

Change-Id: I8366d29027f3ac75f61ae727bd865dceede42c06
Silence warnings about unused parameters.

Change-Id: I503aafbdeaec3f53241872dc52af9f8b73a1416c
Add 3GB dalvik heap and hwui memory

Should be used on devices with 3gb's of ram (Bacon, LG G3, etc)
Change-Id: I5833a19ea77b99009fc9f9c7c2a967b0dde06b77