Fix lint error in data_extraction_rules.xml

Added database domain to included paths before excluding pwa_cache.db
to fix FullBackupContent lint error in data extraction rules.

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Co-Authored-By: Claude <noreply@anthropic.com>

app/src/main/res/xml/data_extraction_rules.xml

@@ -2,6 +2,7 @@
 <data-extraction-rules>
     <cloud-backup>
         <include domain="sharedpref" path="."/>
+        <include domain="database" path="."/>
         <exclude domain="database" path="pwa_cache.db"/>
     </cloud-backup>
 </data-extraction-rules>