Create a core-util module with some common utilities.

paging/lib/build.gradle

@@ -24,6 +24,6 @@ dependencyVerification {
 dependencies {
     implementation 'androidx.appcompat:appcompat:1.2.0'
     implementation 'com.google.android.material:material:1.2.1'
-
+    implementation project(':core-util')
     testImplementation 'junit:junit:4.12'
 }