Add androidx package to the import ordering.

Make it so that androidx imports have to be listed right after
android.* imports.

Bug: 76692459
Test: None
Change-Id: I40e07741e558ce8aae03319613df03b11ee1bbb6
Merged-In: I40e07741e558ce8aae03319613df03b11ee1bbb6
diff --git a/default-treewalker-checks.xml b/default-treewalker-checks.xml
index 8ae9f56..7e09891 100644
--- a/default-treewalker-checks.xml
+++ b/default-treewalker-checks.xml
@@ -158,7 +158,7 @@
 <module name="ImportOrder">
   <property name="severity" value="error"/>
   <message key="import.ordering" value="Wrong order for {0} import. Use Ctrl+Shift+O (Eclipse) or Ctrl+Alt+O (Intellij) to sort imports. https://source.android.com/setup/code-style#order-import-statements"/>
-  <property name="groups" value="android, com.android, dalvik, com, gov, junit, libcore, net, org, java, javax"/>
+  <property name="groups" value="android, androidx, com.android, dalvik, com, gov, junit, libcore, net, org, java, javax"/>
   <property name="ordered" value="true"/>
   <property name="option" value="top"/>
   <property name="separated" value="true"/>