Add warning about multiple tests in one file am: 0c01919f91

Original change: https://android-review.googlesource.com/c/platform/system/logging/+/2939782

Change-Id: I751b1b3f8ebdcfd1d152abef8a974318a3f97bc5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
tree: ae2214ebd35c0e99f0af262ba540bfb5c4bb9ae7
  1. liblog/
  2. logcat/
  3. logd/
  4. logwrapper/
  5. rust/
  6. OWNERS
  7. PREUPLOAD.cfg
  8. TEST_MAPPING