BlacklistViewModel: Filter packages which are not apps

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

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

@@ -0,0 +1,17 @@
+package com.aurora.extensions
+
+import android.content.pm.PackageInfo
+import android.os.Process
+
+fun PackageInfo.isApp(): Boolean {
+    if (this.applicationInfo == null) return false
+
+    return when {
+        isQAndAbove() -> {
+            Process.isApplicationUid(this.applicationInfo.uid) &&
+                    !this.applicationInfo.isResourceOverlay && !this.isApex
+        }
+        isNAndAbove() -> Process.isApplicationUid(this.applicationInfo.uid)
+        else -> this.packageName != null && this.versionName != null
+    }
+}