Fix alpha/stencil replace on Adreno when color masked #16379
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When masking via uniform, we don't care about the lower bits of alpha. Games often use 7F / 80 to control writes of FF/00.
Playing it safe for 5xx devices and assuming they are still affected.
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Fixes #13391, fixes #13886 (at least for the frame dumps.) The workaround in #10421 was activating, but didn't care about replacing alpha with stencil. This makes it blend based on the mask.
While looking for why, I noticed that we set uniformMask to 0x7FFFFFFF when games use 5551 and specify everything but alpha masked, which is a bit wrong. Better to write FF not 80. In theory, could do this for 4444 as well, but I don't think it's as important there.
-[Unknown]