codecs: ignore failed codec builder

Currently there are two codec builders:
omx and c2. When one of them fails to build,
the other one might still succeed.
This situation can happen in 64bit only guest.
when omx will fail as WAI; but c2 can succeed.

This cl will ignore the failed builder and
continue with other builders.

BUG: 170418402

Test:
lunch sdk_phone64_x86_64-userdebug
m -j
emulator

check codec lists

Change-Id: I7e17e07130dd7dab8666a59ad5d5b9fdff5b8b8a