add camera wrapper
add libI420colorconvert source and built it
Revert "add camera wrapper"

This reverts commit cef7c7a895a781fb421c76e44e673cb0e252a222.
Revert "add DISABLE_HW_ID_MATCH_CHECK for camera"

This reverts commit 37d04ab23d51293dc8dd2a907ec8d836b9d1a65e.
Revert "fixup signal strength"

This reverts commit 93436abd67f36da16e5f4f3e6e0e3435c317aa3c.