Lint : remove unused ressources

Signed-off-by: Adrien Maglo <magsoft@videolan.org>
Audio : fix bad icons references.

Signed-off-by: Adrien Maglo <magsoft@videolan.org>
i10n: update French translation
Util: add a function to get a resource id from an attribute id
Styles: replace colors by attributes
Manifest: restore the declaration of the BrowserActivity
ExpandableLayout: remove unused code
Audio player: remove useless color definitions in the layout
Styles: add an ugly black theme.

Please change the drawables and colors.
Styles: change the default font color of the black theme to white
VideoPlayerActivity: use symbolic constant when setting Hardware Acceleration
Styles: fix a wrong indentation
Styles: add a missing color file
History: fix a crash during item layout initialization
SlidingPaneLayout: remove a wrong warning
SlidingPaneLayout: trigger the listener events even when the first layout has not yet occured
Implement an event for LibVLC indicating VideoPlayerActivity was started

This event is necessary in order to know if it is safe to use
MediaCodec opaque direct rendering. If VideoPlayerActivity is not
started, no surface will be attached to LibVLC and thus the decoder
will wait forever.
fix equalizer loading
AudioBrowserListAdapter: fix the view recycling
AudioService: remove obsoleted check for now