Add dataExtractionRules, applicable to Android 12. Exclude everything from being backed up. Also properly support Android 11.

tools/lint/lint.xml

@@ -87,6 +87,7 @@
 
     <!-- Manifest -->
     <issue id="PermissionImpliesUnsupportedChromeOsHardware" severity="error" />
+    <issue id="DataExtractionRules" severity="error" />
 
     <!-- Performance -->
     <issue id="UselessParent" severity="error" />

vector/src/main/res/xml/backup_rules.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<full-backup-content>
+    <exclude
+        domain="file"
+        path="." />
+    <exclude
+        domain="database"
+        path="." />
+    <exclude
+        domain="sharedpref"
+        path="." />
+    <exclude
+        domain="external"
+        path="." />
+    <exclude
+        domain="root"
+        path="." />
+</full-backup-content>

vector/src/main/res/xml/data_extraction_rules.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<data-extraction-rules>
+    <cloud-backup>
+        <exclude domain="root" />
+        <exclude domain="file" />
+        <exclude domain="database" />
+        <exclude domain="sharedpref" />
+        <exclude domain="external" />
+    </cloud-backup>
+    <device-transfer>
+        <exclude domain="root" />
+        <exclude domain="file" />
+        <exclude domain="database" />
+        <exclude domain="sharedpref" />
+        <exclude domain="external" />
+    </device-transfer>
+</data-extraction-rules>