codec2: add support for webm and 3gpp output format

Test: setprop debug.stagefright.ccodec yes
Test: screenrecord --mime-type video/x-vnd.on2.vp8 --codec-name c2.google.vp8.encoder --output-format webm /sdcard/record.webm
Test: screenrecord --mime-type video/x-vnd.on2.vp9 --codec-name c2.google.vp9.encoder --output-format webm /sdcard/record.webm
Test: screenrecord --size 176x144 --mime-type video/3gpp --codec-name c2.google.h263.encoder  --output-format 3gpp /sdcard/record.3gpp
Change-Id: I2c017a231a0f76a03aff0758c57441275c7bd6d5