am f6fc4131: am 4984e73d: Manage button and keyboard backlights with light sensor in both manual and automatic mode.

Merge commit 'f6fc41314d253962720b2c75f3a64025037acf0e' into eclair-mr2-plus-aosp

* commit 'f6fc41314d253962720b2c75f3a64025037acf0e':
  Manage button and keyboard backlights with light sensor in both manual and automatic mode.