BlacklistViewModel: Move label check to extension

Let other classes take benefit of this check as well

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

app/src/main/java/com/aurora/extensions/PackageInfo.kt

@@ -1,11 +1,15 @@
 package com.aurora.extensions
 
 import android.content.pm.PackageInfo
+import android.content.pm.PackageManager
 import android.os.Process
 
-fun PackageInfo.isValidApp(): Boolean {
+fun PackageInfo.isValidApp(packageManager: PackageManager): Boolean {
     if (this.applicationInfo == null || this.packageName.isEmpty()) return false
 
+    // Most core AOSP system apps use their package name as label
+    if (this.applicationInfo!!.loadLabel(packageManager).startsWith(this.packageName)) return false
+
     return when {
         isQAndAbove() -> {
             Process.isApplicationUid(this.applicationInfo!!.uid) &&