Add support for generated documentation as part of the SDK docs.
Add support for generated documentation as part of the SDK docs.

This can be done by adding the list of files to include to the
ALL_GENERATED_DOCS variable, and then making sure to put your generated output
files under $(OUT_DOCS)/gen.

Change-Id: Ie068a3fadccf7c990ec8e26b92ad408e7314469e

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base