There isn't a separate bootloader any more, so it can't cause
failure. The strings we are looking for to generate them are never
sent by anything.
I'm keeping the related constants in Telemetry & the Java API, because
changing those is non-trivial, and they're pretty harmless. (We should
deprecate the API constants next time round.)
I'm leaving the PVMFW constants, even though we don't currently send
those strings either, since that might change.
Bug: 274567065
Test: atest MicrodroidTests
Change-Id: I91310b98e4bc983af76db2c99cbb1e46f396903b
de96446fbd