move all packagingOptions exclusions into a single closure

// FREEBIE

build.gradle

@@ -155,6 +155,8 @@ android {
         exclude 'LICENSE'
         exclude 'NOTICE'
         exclude 'asm-license.txt'
+        exclude 'META-INF/LICENSE'
+        exclude 'META-INF/NOTICE'
     }
 
     signingConfigs {
@@ -207,11 +209,6 @@ android {
         }
     }
 
-    packagingOptions {
-        exclude 'META-INF/LICENSE'
-        exclude 'META-INF/NOTICE'
-    }
-
      lintOptions {
         abortOnError false
     }