Replace import with fully qualified javadoc.

Some internal changes are depending more strongly on annotations
being "leaves" which don't directly reference other parts of the OS,
so replace the direct import of Intent with a qualified javadoc
reference.

Bug: 144247087
Test: atest --test-mapping packages/providers/MediaProvider
Change-Id: I198d84a755b5e270a19b41328f6a6e152112c40a
Merged-In: I198d84a755b5e270a19b41328f6a6e152112c40a