Update sample prebuilts for lmp-mr1-ub-docs (DO NOT MERGE)

Also added Camera2Raw to sdk.atree. These changes have already been made
downstream in mnc-dev, but that sample was cherry-picked backwards.

Synced to /developers/samples/android commit
9d37fdb04df6b3cb0d9894874394576c181221ab.

Change-Id: I1cda73889b043e40654323eb3b9c723cfb148185
34 files changed