We had these specified directly in AndroidManifest.xml due to
our internal build setup. This change makes our internal build
re-write AndroidManifest.xml to dynamically insert the required
values, meaning they no longer need specifying in each manifest.
Bonus 1: Internally built demo apps now include the CL number at
which they're built in the version name :).
Bonus 2: Removes lint warning that complains min/target SDK
values in the manifest are redundant.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=188489115
