android: Introduce JPEG encoding

Provide an encoder interface and implement a JPEG encoder using libjpeg.

Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/android/meson.build

@@ -6,12 +6,17 @@ android_hal_sources = files([
     'camera_device.cpp',
     'camera_metadata.cpp',
     'camera_ops.cpp',
+    'jpeg/encoder_libjpeg.cpp',
 ])
 
 android_camera_metadata_sources = files([
     'metadata/camera_metadata.c',
 ])
 
+android_deps = [
+    dependency('libjpeg'),
+]
+
 android_camera_metadata = static_library('camera_metadata',
                                          android_camera_metadata_sources,
                                          include_directories : android_includes)