su: support drop capabilities

app/core/src/main/java/com/topjohnwu/magisk/core/model/su/SuPolicy.kt

@@ -4,15 +4,16 @@ import com.topjohnwu.magisk.core.data.magiskdb.MagiskDB
 
 class SuPolicy(
     val uid: Int,
-    var policy: Int = INTERACTIVE,
+    var policy: Int = QUERY,
     var remain: Long = -1L,
     var logging: Boolean = true,
     var notification: Boolean = true,
 ) {
     companion object {
-        const val INTERACTIVE = 0
+        const val QUERY = 0
         const val DENY = 1
         const val ALLOW = 2
+        const val RESTRICT = 3
     }
 
     fun toMap(): MutableMap<String, Any> {