tree ad2c93d1410a862742e58ec1ee9466f3cb4ccf1f
parent 2a9b7d7f9e4fa9b69052c4fdcbebab335f55d0b3
author Tianjie <xunchang@google.com> 1597777138 -0700
committer Anton Hansson <hansson@google.com> 1607960871 +0000

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
Merged-In: I37ab41cf2ed7bc9cb6db6b4700c03ab48ed31fff
Change-Id: Ied45347c3e56e56d1372d51b98d7e52b02ff4755
(cherry-picked from commit 6e93f484ac8cbfb5eb95d3a7312280735d31ec70)