revert: [android] assert cannot register empty client*

Current implementation on all platforms allowed, to support existing implementation this assertion is reverted.

android/src/main/kotlin/com/twilio/twilio_voice/storage/StorageImpl.kt

@@ -75,15 +75,17 @@ class StorageImpl(ctx: Context) : Storage {
     }
 
     override fun addRegisteredClient(id: String, name: String): Boolean {
-        assert(id.isNotEmpty()) { "addRegisteredClient: id cannot be empty" }
+        // TODO: remove this assert, it's not needed now.
+//        assert(id.isNotEmpty()) { "addRegisteredClient: id cannot be empty" }
         prefs.let {
             val editor = it.edit()
             return editor.putString(id, name).commit()
         }
     }
 
     override fun removeRegisteredClient(id: String): Boolean {
-        assert(id.isNotEmpty()) { "removeRegisteredClient: id cannot be empty" }
+        // TODO: remove this assert, it's not needed now.
+//        assert(id.isNotEmpty()) { "removeRegisteredClient: id cannot be empty" }
         prefs.let {
             val editor = it.edit()
             return editor.remove(id).commit()