Merge branch '12-improve-get-convert-optimize-images-assets' into 'master'

Resolve "Improve get/convert/optimize images assets"

Closes #12

See merge request android/wordguessing!10

android/gradle.properties

 org.gradle.jvmargs=-Xmx1536M
 android.useAndroidX=true
 android.enableJetifier=true
-app.versionName=0.0.8
-app.versionCode=8
+app.versionName=0.0.9
+app.versionCode=9

assets/assets_images.json

@@ -160,6 +160,7 @@
       "18f5595ef8ad662104416e03beb60bf3.png",
       "8271e1b3c3334deee1ea22bc681bc973.png",
       "b79e600058074c89710111fa2cff414e.png",
+      "d2ecf8412aec9da87610646deacb35f7.png",
       "db9ab5c7ce8e7bc5b94d9f355df303d5.png",
       "eeaad3346be230f02d991d834d7e7711.png"
     ],