Android: automatically deploy playlist plugins.

Include the playlistformats directory for automatic plugin deployment.

Change-Id: Ie61a4b1c1637a493e1bdb7354b33060728ccabda
Reviewed-by: Christian Stromme <christian.stromme@digia.com>
WMF: fix some crashes.

Task-number: QTBUG-30827
Change-Id: Iafc53f7095ad9c086b3982afb2af045c54497dc9
Reviewed-by: Christian Stromme <christian.stromme@digia.com>
WMF: remove dead code.

Change-Id: Ib3b595263e64336cc5d0482edd890e7b4e534927
Reviewed-by: Christian Stromme <christian.stromme@digia.com>
Android: fix camera preview

At some(?) devices we can't rely on one shot preview callback because
it receives data only after we start new previewing session. And this
cause situation when imageCaptured signal is never emitted.
This fix applies preview callback with already allocated buffers and
collects all preview images in these buffers. When we capture image -
we can simply fetch last preview image (if there was any) from c++ part.

Task-number: QTBUG-34993
Change-Id: I608750c344ca3c089f4673df4907e0f47e57e2ba
Reviewed-by: Yoann Lopes <yoann.lopes@digia.com>