Benchmark : Add flac vectors for DecoderTest and EncoderTest

Test: decoderTest --gtest_repeat=10 -P /sdcard/res/
Test: encoderTest --gtest_repeat=10 -P /sdcard/res/

Bug: 141225164

Change-Id: Id11a1cfa65118f2689393352037ead31f7961189
2 files changed