Clean up extra lines.

app/src/main/AndroidManifest.xml

@@ -8,11 +8,9 @@
         android:supportsRtl="true"
         android:theme="@style/InfiniteTimer"
         android:configChanges="keyboard|keyboardHidden|orientation|screenLayout|uiMode|screenSize|smallestScreenSize">
-        <activity android:name=".MainActivity"
-            android:exported="true">
+        <activity android:name=".MainActivity" android:exported="true">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
-
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>