change android image to 24 from 25 because of circle ci failure to load emulator

Author: thomaszurkan-optimizely

.circleci/config.yml

@@ -37,7 +37,10 @@ jobs:
     #      command: sdkmanager --list
       - run:
           name: Setup emulator
-          command: sdkmanager "system-images;android-25;google_apis;armeabi-v7a" && echo "no" | avdmanager create avd -n test -k "system-images;android-25;google_apis;armeabi-v7a"
+          command: sdkmanager "system-images;android-24;google_apis;armeabi-v7a
+                  " && echo "no" | avdmanager create avd -n test -k "system-images;android-24;goog
+                  le_apis;armeabi-v7a"
+    #          command: sdkmanager "system-images;android-25;google_apis;armeabi-v7a" && echo "no" | avdmanager create avd -n test -k "system-images;android-25;google_apis;armeabi-v7a"
       - run:
           name: Launch emulator
           command: export LD_LIBRARY_PATH=${ANDROID_HOME}/emulator/lib64:${ANDROID_HOME}/emulator/lib64/qt/lib && emulator64-arm -avd test -noaudio -no-boot-anim -no-window -accel on