Finish bluetooth detail fragment if device is BOND_NONE

This CL is used to check the bluetooth bond state when
fragment is onResume. The bluetooth detail fragment will
finish if the bluetooth bond state is BOND_NONE when
fragment is onResume.

Bug: 146621601
Test: make -j42 RunSettingsRoboTests
Change-Id: I157e1da925dcf527ce2b49ad431079d90b7c4fc3

src/com/android/settings/bluetooth/BluetoothDeviceDetailsFragment.java

@@ -16,6 +16,7 @@
 
 package com.android.settings.bluetooth;
 
+import static android.bluetooth.BluetoothDevice.BOND_NONE;
 import static android.os.UserManager.DISALLOW_CONFIG_BLUETOOTH;
 
 import android.app.settings.SettingsEnums;
@@ -127,6 +128,20 @@ public class BluetoothDeviceDetailsFragment extends RestrictedDashboardFragment
                 : null);
     }
 
+    @Override
+    public void onResume() {
+        super.onResume();
+        finishFragmentIfNecessary();
+    }
+
+    @VisibleForTesting
+    void finishFragmentIfNecessary() {
+        if (mCachedDevice.getBondState() == BOND_NONE) {
+            finish();
+            return;
+        }
+    }
+
     @Override
     public int getMetricsCategory() {
         return SettingsEnums.BLUETOOTH_DEVICE_DETAILS;