The body of {@code} must not be HTML escaped. This is one of
several changes that fix the source in conjunction with a
doclava fix.
Bug: 25757239
Change-Id: Ib38a0fa2dd2a3d68e467f78a812071e763d7e881
* revise to the Compatibility doc, put it in Intro
* put Permissions in Intro
* put App Fundamentals in Intro
* move Manifest docs to the top of side nav tree
* move App Resources above UI
Will perform another fix to the Best Practices section
later to deprecate some docs there and point to Training instead
Change-Id: I88a8f94167ba15e97eb3bbbc08fd82dd82498e4b
