Updated generated apk file name

app/build.gradle

@@ -21,6 +21,16 @@ android {
         checkReleaseBuilds false
         abortOnError false
     }
+
+    android.applicationVariants.all { variant ->
+        variant.outputs.each { output ->
+            def outputFile = output.outputFile
+            if (outputFile != null && outputFile.name.endsWith('.apk')) {
+                def fileName = outputFile.name.replace("app", "${defaultConfig.applicationId}_${defaultConfig.versionName}_${System.currentTimeMillis()}")
+                output.outputFile = new File(outputFile.parent, fileName)
+            }
+        }
+    }
 }
 
 dependencies {