Resolve "Add light/dark theme selector"

Closes #64 (closed)

android/gradle.properties

 org.gradle.jvmargs=-Xmx1536M
 android.useAndroidX=true
 android.enableJetifier=true
-app.versionName=1.0.50
-app.versionCode=51
+app.versionName=1.0.51
+app.versionCode=52