[sensorfw] make hybris adaptor work better with suspend and resume modes
as used with mce.

bump version to 0.7.3.23
[sensorfw] try harder to cleanly stop the android reading thread when
destructing.
[sensorfw] make sure MceWatcher has current value at start up.
[sensorfw] turn off/on signals according to standbyOverride and
display state.

need to add core to make it compile with mce
[sensorfw] fix up standby resume the adaptors
Merge pull request #20 from lpotter/master

[sensorfw] make hybris adaptor work better with suspend and resume modes