Add androidx in ChromiumStyle.xml

Bug: 948803
Change-Id: I5a4dab490669b89cfdacaf92e99ba0b8f8a7e4fb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1869125Reviewed-by: Wei-Yin Chen (陳威尹) <wychen@chromium.org>
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Commit-Queue: Yun Liu <yliuyliu@google.com>
Cr-Commit-Position: refs/heads/master@{#707627}

tools/android/android_studio/ChromiumStyle.xml

@@ -19,6 +19,8 @@
     <value>
       <package name="android" withSubpackages="true" static="true" />
       <emptyLine />
+      <package name="androidx" withSubpackages="true" static="true" />
+      <emptyLine />
       <package name="com" withSubpackages="true" static="true" />
       <emptyLine />
       <package name="dalvik" withSubpackages="true" static="true" />
@@ -39,6 +41,8 @@
       <emptyLine />
       <package name="android" withSubpackages="true" static="false" />
       <emptyLine />
+      <package name="androidx" withSubpackages="true" static="false" />
+      <emptyLine />
       <package name="com" withSubpackages="true" static="false" />
       <emptyLine />
       <package name="dalvik" withSubpackages="true" static="false" />