Update build target to restrict it to arm and x86 only

This is to address build breakage for MIPS
https://android-build.googleplex.com/builds/submitted/4400887/sdk_phone_mips-sdk_mac/latest/logs

Bug: 64504762
Test: build successful with target marlin-eng (arm), gce_x86_phone (x86) and sdk_phone_mips (mips)
Change-Id: I710c823ae235d0650b4d1a018180b552261aecc5