Fix irregular indent in template (#29871)

Summary:
Fix irregular indent in template/android/app/build.gradle

![image](https://user-images.githubusercontent.com/26166657/92319046-46417900-f04f-11ea-9051-cb4d7bcc3049.png)

## Changelog

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[Internal] [Fixed] - Fix irregular indent in template

Pull Request resolved: #29871

Test Plan: N/A

Reviewed By: passy, cortinico

Differential Revision: D30360839

Pulled By: sota000

fbshipit-source-id: 7a92890007716c6e244ceffaa697cdd5ad1a0504

template/android/app/build.gradle

@@ -196,7 +196,7 @@ dependencies {
     implementation "androidx.swiperefreshlayout:swiperefreshlayout:1.0.0"
 
     debugImplementation("com.facebook.flipper:flipper:${FLIPPER_VERSION}") {
-      exclude group:'com.facebook.fbjni'
+        exclude group:'com.facebook.fbjni'
     }
 
     debugImplementation("com.facebook.flipper:flipper-network-plugin:${FLIPPER_VERSION}") {