Remove warning about deprecated 'variant.getGenerateBuildConfig()'

core/subsonic-api-image-loader/build.gradle

@@ -1,8 +1,8 @@
 apply from: bootstrap.androidModule
 
 android {
-    libraryVariants.all {
-        generateBuildConfig.enabled = true
+    buildFeatures {
+        buildConfig = true
     }
 }
 

gradle_scripts/android-module-bootstrap.gradle

@@ -39,10 +39,8 @@ android {
         }
     }
 
-    // Disable generating BuildConfig class by default
-    // Replace it with https://issuetracker.google.com/issues/72050365 once released.
-    libraryVariants.all {
-        generateBuildConfig.enabled = false
+    buildFeatures {
+        buildConfig = false
     }
 }