adb: fix windows test build.

The switch over to soong unintentionally turned off building the
Windows tests (and there's a bug preventing them from being turned on).
Preemptively fix the build breakages that'll happen when we turn them
back on.

Test: mma with Android.bp 's/cc_test_host/cc_binary_host' hacks
Change-Id: I6582cfc61b96052537d50d8ba90533dbb66e3e1d