Set target SDK version for buck build

Summary: It was building at target sdk 0 before which lead to various checks failing, in future when these checks fail we should send a notification to flipper

Reviewed By: lblasa

Differential Revision: D39652095

fbshipit-source-id: 748bc74f0b5745011e6289e5582405149df8357f

android/sample/AndroidManifest.xml

@@ -11,6 +11,8 @@
     xmlns:tools="http://schemas.android.com/tools"
     package="com.facebook.flipper.sample">
   <uses-permission android:name="android.permission.INTERNET" />
+  <uses-sdk android:minSdkVersion="15"
+            android:targetSdkVersion="31"/>
 
   <application
       android:name=".FlipperSampleApplication"