AndroidManifest: Drop non-required protected permissions

INSTALL and DELETE packages permissions are only available to system apps
and every project including Aurora Store by default seems to include it
as a user app

Signed-off-by: Aayush Gupta <aayushgupta219@gmail.com>

app/lint.xml

@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <lint>
     <issue id="MissingTranslation" severity="ignore" />
-    <issue id="ProtectedPermissions" severity="ignore" />
     <issue id="QueryAllPackagesPermission" severity="ignore" />
     <issue id="ScopedStorage" severity="ignore" />
 </lint>