Add Android alternate app install permission to UI config (#55)

## Purpose

Add permission scope for alternate app install feature so that the operation can be triggered through device operation UI.

Issue - https://roadmap.entgra.net/issues/9641

Co-authored-by: navodzoysa <navod.zoysa@gmail.com>
Co-authored-by: Pahansith Gunathilake <pahansith@entgra.io>
Reviewed-on: #55
Co-authored-by: Navod Zoysa <navod@entgra.io>
Co-committed-by: Navod Zoysa <navod@entgra.io>

features/device-mgt/org.wso2.carbon.device.mgt.basics.feature/src/main/resources/conf/mdm-ui-config.xml

@@ -212,6 +212,7 @@
         <Scope>perm:admin:tenant:view</Scope>
         <Scope>perm:admin:metadata:view</Scope>
         <Scope>perm:admin:usage:view</Scope>
+        <Scope>perm:android:alternate-install</Scope>
     </Scopes>
     <SSOConfiguration>
         <Issuer>device-mgt</Issuer>