Merge branch 'goog/mnc-mr-docs' into mnc-ub-dev

Large merge to reconnect automerger for docs branch to mainline.

 Conflicts:
	tools/droiddoc/templates-sdk/assets/css/default.css
	tools/droiddoc/templates-sdk/sdkpage.cs

Issue: 28000173
Change-Id: If04c741090d99d384981b8b3554edc58eb82dd0e