Change theme for BluetoothOppTransferHistory

Make it use theme: Theme.DeviceDefault.Settings. This cl
only fix a specific activity, and in P we may need to
refine the theming in bluetooth package.

Bug: 62075537
Test: Screenshot
Change-Id: I065aa59924d11e6db13359a1fc948136547d2237
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 379440d..a086284 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -210,7 +210,8 @@
                   android:label=""
                   android:excludeFromRecents="true"
                   android:configChanges="orientation|keyboardHidden"
-                  android:enabled="@bool/profile_supported_opp">
+                  android:enabled="@bool/profile_supported_opp"
+                  android:theme="@android:style/Theme.DeviceDefault.Settings">
             <intent-filter>
                 <action android:name="com.android.bluetooth.action.TransferHistory" />
                 <category android:name="android.intent.category.DEFAULT" />