Fully-qualify link labels outside current class.

This results in {@link #localMethod()} appearing as "localMethod()"
and {@link OtherClass#method()} appearing as "OtherClass.method()",
making it easier to understand conceptual boundaries.

Bug: 71554546
Test: manual inspection
Change-Id: I33a8497c047885ff88fa608c317a281c069ab68c
1 file changed