Add BOARD_USES_SYSTEM_OTHER_ODEX := true to mainline

Likely not the final setting we'll settle with for this device,
but brings mainline_system builds closer to the device builds
it's targeting.

Bug: 80410283
Test: build mainline_arm64
Change-Id: Ib672d1a060d0ad6a4e1faa210461bbbbaf6f2bc6