Allow OTA package to contain fake AVB version

The system_matrix.xml in compatibility.zip can contain a fake
AVB version as specified by BOARD_OTA_FRAMEWORK_VBMETA_VERSION_OVERRIDE.
This allows OTA to pass compatibility check when the AVB version is
updated *during* the OTA.
Bug: 112291283
Test: specify BOARD_OTA_FRAMEWORK_VBMETA_VERSION_OVERRIDE.
      and manual test.

Change-Id: I250bf3b547eb6edfdcdcee4dff64405f97e74b15
1 file changed