Merge branch '21-add-icon-variant-in-get-images-script' into 'master'

Resolve "Add "icon" variant in get images script"

Closes #21

See merge request !16

android/gradle.properties

 org.gradle.jvmargs=-Xmx1536M
 android.useAndroidX=true
 android.enableJetifier=true
-app.versionName=0.0.14
-app.versionCode=14
+app.versionName=0.0.15
+app.versionCode=15