ferrochrome: Add privapp permissions allowlist

Test: m, boot
Change-Id: I427652fe5d9f8da0055be13eaccd96a1840891cf
diff --git a/ferrochrome_app/privapp-permissions-ferrochrome.xml b/ferrochrome_app/privapp-permissions-ferrochrome.xml
new file mode 100644
index 0000000..987db9c
--- /dev/null
+++ b/ferrochrome_app/privapp-permissions-ferrochrome.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<permissions>
+    <privapp-permissions package="com.android.virtualization.ferrochrome">
+        <permission name="android.permission.KILL_ALL_BACKGROUND_PROCESSES"/>
+    </privapp-permissions>
+</permissions>
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