Created common APIs for NdkMediaCodec fuzzer

The APIs common across NdkMediaCodec fuzzers
are moved to newly created NdkMediaCodecFuzzerBase.cpp
and NdkMediaCodecFuzzerBase.h

Test: make NdkMediaCodecFuzzerBase.cpp
Bug: 231667886

Change-Id: I1f629055ce364ca877469f0ac2442df42554ab31
(cherry picked from commit 15a1e9b6717abb22afd7f61dc6a4b602dc5c301c)
2 files changed