Header for hearing aids now listed in one summary

Root Cause: Change design in Android T to show left-side and right-side
in one summary line.

Bug: 224323976
Test: manual test
Change-Id: Ia43b491d571787d356240593b221d6fe8dd1453c

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

@@ -75,10 +75,8 @@ public class BluetoothDetailsHeaderController extends BluetoothDetailsController
         if (TextUtils.isEmpty(summaryText)) {
             // If first summary is unavailable, not to show second summary.
             mHeaderController.setSecondSummary((CharSequence)null);
-        } else {
-            // If both the hearing aids are connected, two device status should be shown.
-            mHeaderController.setSecondSummary(mDeviceManager.getSubDeviceSummary(mCachedDevice));
         }
+
         mHeaderController.setLabel(mCachedDevice.getName());
         mHeaderController.setIcon(pair.first);
         mHeaderController.setIconContentDescription(pair.second);