tree 58b8955d1815737614874021d47001a39c0bf09e
parent 92e000f1e7ce1d00a80832ec6e3829d83dfe0aca
author Tianjie <xunchang@google.com> 1597777138 -0700
committer Tianjie <xunchang@google.com> 1597777138 -0700

Make ab_ota_partitions read only

Now that we have moved the AB_OTA_BOOTLOADER_PARTITIONS &
AB_OTA_RADIO_PARTITIONS to BoardConfig, we can make the
ab_ota_partitions read only.

Eventually, the variable will be exposed as a product build
property. And we want its value to stay unchanged during the
build process.

Bug: 162148770
Test: build coral
Change-Id: I5258955a5c3303bdc61b97fc92f5dfa1905f7c37