WebView: fix XML indentation

No change to logic. This fixes an indentation formatting inconsistency I
noticed while working on another issue.

Bug: None
Test: None
Flag: TEST_ONLY
Change-Id: I7f8763ba54668ad736a8ee33ec259e4006b89046
diff --git a/tests/tests/webkit/AndroidTest.xml b/tests/tests/webkit/AndroidTest.xml
index 95cfb31..c9a2a45 100644
--- a/tests/tests/webkit/AndroidTest.xml
+++ b/tests/tests/webkit/AndroidTest.xml
@@ -42,6 +42,6 @@
         <option name="runtime-hint" value="6m39s" />
     </test>
     <object type="module_controller" class="com.android.tradefed.testtype.suite.module.MainlineTestModuleController">
-	 <option name="mainline-module-package-name" value="com.google.android.webview.bootstrap" />
+        <option name="mainline-module-package-name" value="com.google.android.webview.bootstrap" />
     </object>
 </configuration>