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
add more information about using drawables,
move 'managing the activity lifecycle' down a notch, because it's less interesting.
Change-Id: I75012207bfaa499ca881ec5cc3a94e8d66addbad