am 3cba7288: Merge change I6ccd2ebc into eclair

Merge commit '3cba72880b78b81cda2868136462c9e261a3e403' into eclair-mr2

* commit '3cba72880b78b81cda2868136462c9e261a3e403':
  Expose PowerManager.isScreenOn in the public api.