This CL adds support to report PSNR between incoming and resulting
encoded frames. Eventually be reported upstream as part of a feedback
mechanism.
Test: avcenc -c enc.cfg
Bug: b/235899898
Change-Id: Id520913ca5964965b5a86bc520240ccd1b28176c
Cmake scripts are now modular. Separate scripts now handle
build specifications for each target and dependency.
Toolchain files have been added for armv7, armv8 builds.
Bug: 213579857
Test: Builds using cmake
Test: Builds in OSS-fuzz
Change-Id: Iac62b443c0a0de09a2ce6553a660db2c3d5dc846