Move wait-for-emulator out of F-Droid subdir

It doesn't specifically apply only to the client.

.gitlab-ci.yml

@@ -31,7 +31,7 @@ test:
     - echo no | android create avd --force -n fcl-test -t android-10 -b armeabi
     - echo " == Starting Android 2.3.7 emulator"
     - emulator -force-32bit -avd fcl-test -no-skin -no-audio -no-window &
-    - ./F-Droid/tools/wait-for-emulator
+    - ./tools/wait-for-emulator
     - adb shell input keyevent 82
     - echo " == Running Android tests on the 2.3.7 emulator"
     - ADB_INSTALL_TIMEOUT=8 gradle connectedCheck || { adb logcat -d '*:W'; exit 1; }