Android 10 (API 29) added support for isHardwareAccelerated() to
MediaCodecInfo to detect whether a particular MediaCodec is backed by
hardware or not. We can now use that to ensure that the video hw-codec
is PRIMARY+1 on Android, since using a software codec for video is
simply not feasible most of the time.
If we're not able to detect isHardwareAccelerated(), perhaps because
the Android API version is too old, we try to use the codec name as
a fallback.
Also rank PRIMARY+1 the c2.android c2.exynos and c2.amlogic audio
codecs alongside OMX.google, because they are known-good.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/9225>
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