bluejay: Add build_flags based properties for SMR/EMR build

Flag: build.RELEASE_IS_SMR
Flag: build.RELEASE_IS_EMR
Flag: build.RELEASE_BASE_OS_BLUEJAY
Bug: 155105803
Change-Id: Iaa1152d44cafa8a0c14843ac8eacf27ccb827514
1 file changed