blast: Append "_legacy" to old buffer state values

As we move from BufferQueueLayer to BufferStateLayer, some
layer state fields are used by both layer types and some
are used exclusively by one type of layer. Append "_legacy"
to all fields that are NOT used by BufferStateLayer.

Bug: 80477568
Test: Transaction_test.cpp
Change-Id: Id8bf27f5b68c00592136e4336442a5d388f35779
15 files changed