Move version specifier

Summary: Android Studio keeps loudly complaining about this.

Reviewed By: priteshrnandgaonkar

Differential Revision: D13376394

fbshipit-source-id: 6163977bb013dff214aa684662e4879a19a7a786

android/sample/AndroidManifest.xml

@@ -6,8 +6,6 @@
   <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
   <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
 
-  <uses-sdk android:targetSdkVersion="24" />
-
   <application
       android:name=".FlipperSampleApplication"
       android:label="@string/app_name"

android/sample/build.gradle

@@ -7,6 +7,7 @@ android {
         minSdkVersion rootProject.minSdkVersion
         testInstrumentationRunner 'androidx.test.runner.AndroidJUnitRunner'
         applicationId 'com.facebook.flipper.sample'
+        targetSdkVersion 24
     }
 
     lintOptions {