gitlab-ci: provide debug info for connected24 failures

connected24 tests are frequently failing saying that while an emulator
is running, its not compatible.  This is bizarre. This just adds debug
output to help troubleshoot that.

.gitlab-ci.yml

@@ -56,9 +56,11 @@ connected24:
     AVD_SDK: "24"
   script:
     - ./gradlew assembleDebug -PdisablePreDex
+    - android list avd
     - emulator64-arm -avd fcl-test-$AVD_SDK -no-audio -no-window &
     - ./tools/wait-for-emulator
     - adb shell input keyevent 82 &
+    - adb devices
     - export EXITVALUE=0
     - ./gradlew connectedCheck -PdisablePreDex || {
         adb -e logcat -d '*:E';