Enables config cache by setting problems to warn.

Fixes #1022

Change-Id: I35040a58974bd6ce0738b38ff582d93787008a86

gradle.properties

@@ -23,6 +23,10 @@ org.gradle.caching=true
 
 # Enable configuration caching between builds.
 org.gradle.configuration-cache=true
+# This option is set because of https://github.com/google/play-services-plugins/issues/246
+# to generate the Configuration Cache regardless of incompatible tasks.
+# See https://github.com/android/nowinandroid/issues/1022 before using it.
+org.gradle.configuration-cache.problems=warn
 
 # AndroidX package structure to make it clearer which packages are bundled with the
 # Android operating system, and which are packaged with your app"s APK
@@ -35,3 +39,4 @@ kotlin.code.style=official
 # https://developer.android.com/build/releases/gradle-plugin#default-changes
 android.defaults.buildfeatures.resvalues=false
 android.defaults.buildfeatures.shaders=false
+