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Remove redundant Nullable annotation for applyDisplayChangeIfNeeded

method.

Bug: none
Flag: EXEMPT minor optimization
Change-Id: I3b644949d5c7e1981f27d0ee7716163206b1b1b8
L
lijilou committed
da447244e130164a25bccf23d05efb25f3275f63
Parent: 2576ad7