Asan fix warning for 1-bit vert
1-bit vertical displays overread the buffer due to the way the
packing works, this isn't the hottest path anyway but
we can check if height <= 8 and make stride 0 so the dummy data
gets the beginning of the data instead
Change-Id: I88ab4dc37bfd2d680d125f964beafe0ddfb00645
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