Moved DataSources storage to SharedPreferences

app/build.gradle

@@ -26,15 +26,8 @@ android {
         }
     }
 
-//    def props = new Properties()
-//    file("../securityKeys.properties").withInputStream { props.load(it) }
-
     buildTypes {
         release {
-//            buildConfigField "String", "ApiKey", props.getProperty("apiKey")
-//            minifyEnabled true
-//            shrinkResources true
-//            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
             postprocessing {
                 removeUnusedCode true
                 removeUnusedResources true