Add camera metadata fuzzer

A fuzzer is added to automatically test various
input combination, including meaningless ones,
to catch possible crashes which may be potential
security flaws as well. camera_metadata though
not a public API, is still an API used internally
and therefore important to examine.

Test: build and run
Bug: N/A

Change-Id: Ief487936ba77ef8644112c1c0dd2f0964d7c7cf8
2 files changed