Bluetooth: mLocalAdapter should never be null

* mLocalAdapter should never be null
* We should crash if it is ever null

Bug: 63442969
Test: make, pair Bluetooth device
Change-Id: If98f9ea0762927eb57d00224b62abf24bbec69ba
diff --git a/src/com/android/settings/bluetooth/BluetoothPairingDetail.java b/src/com/android/settings/bluetooth/BluetoothPairingDetail.java
index 6545ed1..d7b86c5 100644
--- a/src/com/android/settings/bluetooth/BluetoothPairingDetail.java
+++ b/src/com/android/settings/bluetooth/BluetoothPairingDetail.java
@@ -70,10 +70,8 @@
     public void onStart() {
         super.onStart();
 
-        if (mLocalAdapter != null) {
-            updateContent(mLocalAdapter.getBluetoothState());
-            mAvailableDevicesCategory.setProgress(mLocalAdapter.isDiscovering());
-        }
+        updateContent(mLocalAdapter.getBluetoothState());
+        mAvailableDevicesCategory.setProgress(mLocalAdapter.isDiscovering());
     }
 
     @Override