Empty the permission cache whe the app is resumed

application/vlc-android/src/org/videolan/vlc/gui/BaseActivity.kt

@@ -119,6 +119,11 @@ abstract class BaseActivity : AppCompatActivity() {
         }
     }
 
+    override fun onResume() {
+        super.onResume()
+        Permissions.emptyCache()
+    }
+
     override fun onRequestPermissionsResult(
         requestCode: Int,
         permissions: Array<String?>,

application/vlc-android/src/org/videolan/vlc/util/Permissions.kt

@@ -103,7 +103,12 @@ object Permissions {
         return !AndroidUtil.isMarshMallowOrLater || android.provider.Settings.System.canWrite(context)
     }
 
-    fun getFromCache (context: Context, permissionType: PermissionType) : Boolean {
+
+    fun emptyCache() {
+        cache.clear()
+    }
+
+    private fun getFromCache (context: Context, permissionType: PermissionType) : Boolean {
         cache[permissionType]?.let {
             if (it.first < System.currentTimeMillis() - 5000L) {
                 cache.remove(permissionType)