Ensure opcode imm is always written first am: 823351faca

Original change: https://android-review.googlesource.com/c/platform/packages/modules/NetworkStack/+/2900212

Change-Id: I6dfbdf519e17033016fced6dab71ebfb9862c2a1
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>