Ensure Android (virtual) device could be unlocked before running test.

On non-CI environment, the device may already be created and just being reattached to the daemon. The unlock key event should only be sent after the device is ready (the launcher is running nd no more bootanimation process).

Rakefile

@@ -330,23 +330,23 @@ def android_prepare_device api, name = 'test'
       system "echo 'no' |android create avd -n #{name} -t android-#{api}" or abort "Failed to create '#{name}' Android virtual device"
     end
     system "if [ $CI ]; then export OPTS='-no-skin -no-audio -no-window -no-boot-anim -gpu off'; else export OPTS='-gpu on'; fi; emulator -avd #{name} $OPTS &"
-  else
-    # Otherwise, try to unlock it just in case it is locked
-    system "adb shell 'input keyevent 82; input keyevent 4'"
   end
+  return 0;
 end
 
 def android_wait_for_device retries = -1, retry_interval = 10, package = 'com.android.launcher'
   # Wait until the indicator process is running or it is killed externally by Travis-CI or by user via Ctrl+C or when it exceeds the number of retries (if given)
   puts "\nWaiting for device...\n\n"
   # Capture adb's stdout and interpret it because adb does not return exit code from its last shell command
-  return /timeout/ =~ `adb wait-for-device shell 'retries=#{retries}; until [ $retries -eq 0 ] || ps |grep -c #{package} 1>/dev/null; do sleep #{retry_interval}; if [ $retries -gt 0 ]; then let retries=retries-1; fi; done; if [ $retries -eq 0 ]; then echo timeout; fi'` ? nil : 0;
+  return /timeout/ =~ `adb wait-for-device shell 'retries=#{retries}; until [ $retries -eq 0 ] || ps |grep -c #{package} 1>/dev/null; do sleep #{retry_interval}; if [ $retries -gt 0 ]; then let retries=retries-1; fi; done; if [ $retries -eq 0 ]; then echo timeout; else while ps |grep -c bootanimation 1>/dev/null; do sleep 1; done; fi'` ? nil : 0;
 end
 
 def android_test_run intent = '.SampleLauncher', package = 'com.github.urho3d', success_indicator = 'Added resource path /apk/CoreData/', payload = 'input tap 10 200', timeout = 30
   # Capture adb's stdout and interpret it because adb neither uses stderr nor returns proper exit code on error
   begin
     IO.popen("adb shell <<EOF
+# Try to unlock the device just in case it is locked
+input keyevent 82; input keyevent 4
 # Clear the log
 logcat -c
 # Start the app