Android: rename DataFetcherImplAndroid -> SensorManagerAndroid.

Renamed all occurences of DataFetcherImplAndroid to SensorManagerAndroid
to better reflect current implementation of Device Motion/Orientation.
Also the relevant tests and files have been renamed in this patch.

BUG=334342

Review URL: https://codereview.chromium.org/137853006

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@251367 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 251367