[race condition] Improve hotseat availability when launcher is recreated

In cases where onCreate does not get called before bindPredictedItems, mHotseatPredictionController will be null. This results in the hotseat remaining empty until AiAi sends predictions.

Bug: 158867468
Test: Manual
Change-Id: I4f3c3fc41f489e96a9f91dc9505202ae9ce9cce1
1 file changed