C2 VTS: Add support to choose component/s to be tested

Pass an optional --prefix <component name prefix> to
pick one or more codecs that start with a given prefix

Bug: 183654653
Bug: 183623300
Test: atest VtsHalMediaC2V1_0TargetComponentTest -- \
 --module-arg VtsHalMediaC2V1_0TargetComponentTest:\
 native-test-flag:--prefix=c2.android

Change-Id: Id1c9f398f5d752f1f2f87cb6068119baa799020c