Merge "Move testing.go to srcs from testSrcs." am: 2cc767d7

Original change: https://android-review.googlesource.com/c/platform/build/soong/+/2183860



Change-Id: I9fa1b716f071eefa944b06a8045b6dac2ac2c1c4
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>