df23c7da03
(This is a merge of http://go/wvgerrit/140850.) This patch fixes a number of minor issues in the codebase (mostly instances of 0-as-nullptr, but also some member shadowing and a missing override) that were being hidden by the fact that depending on Protobuf disables these diagnostics. And which will be unhidden when a later patch removes that behavior from Protobuf. Bug: 208304830 Test: x86-64 Change-Id: I4b0b1264748880b3726a6388d589868d898f949e