correct the parameter of CreateImage to avoid green area
modify the target bit rate at initialization to be startBitrate
Merge remote-tracking branch 'upstream/openh264_integration' into openh264_integration

Conflicts:
	media/webrtc/signaling/src/media-conduit/WebrtcOpenH264VideoCodec.cpp
Merge branch 'openh264_integration' of https://github.com/ekr/gecko-dev into openh264_integration

Conflicts:
	media/webrtc/signaling/src/media-conduit/WebrtcOpenH264VideoCodec.cpp
sync from upstream
sync from upstream
apply better operation with skip frames and remove a return which may cause missing deleting inputimage
Merge branch 'openh264_integration' of https://github.com/ekr/gecko-dev into openh264_integration

Conflicts:
	media/webrtc/signaling/src/media-conduit/WebrtcOpenH264VideoCodec.cpp
Merge branch 'openh264_integration' of https://github.com/ekr/gecko-dev into openh264_integration
add SetRates functions
improve SetRates function