Mark QuietComfort 35 II as supported

Thanks @gaborrell (#4) and James Gregory (email) for testing this
device. Committing this now to record it, but I'm hesitant to include
this entry and the SoundLink Mini II one I added recently in a release
just yet. Two new pieces of information have come to light:

 1. All devices except the SoundLink Color II have additional .xuv
    firmware files that likely need to be flashed somehow to ensure
    correct operation. Without support for those, I don't think it's
    truthful to call ourselves "compatible". See #6.

 2. All three of the tested devices have the same normal mode PID,
    0x40fe. Assuming some untested devices do too, we should stop using
    that alone to mark a device as compatible.

70-bose-dfu.rules

@@ -1,7 +1,13 @@
 # Bose PIDs
 
-# SoundLink Color II, normal and DFU modes respectively
-SUBSYSTEM=="hidraw", ATTRS{idVendor}=="05a7", ATTRS{idProduct}=="40fe|400d", TAG+="uaccess"
+# All devices tested so far, normal mode
+SUBSYSTEM=="hidraw", ATTRS{idVendor}=="05a7", ATTRS{idProduct}=="40fe", TAG+="uaccess"
 
-# SoundLink Mini II, DFU mode (normal mode shared with Color II)
+# SoundLink Color II, DFU mode
+SUBSYSTEM=="hidraw", ATTRS{idVendor}=="05a7", ATTRS{idProduct}=="400d", TAG+="uaccess"
+
+# SoundLink Mini II, DFU mode
 SUBSYSTEM=="hidraw", ATTRS{idVendor}=="05a7", ATTRS{idProduct}=="4009", TAG+="uaccess"
+
+# QuietComfort 35 II, DFU mode
+SUBSYSTEM=="hidraw", ATTRS{idVendor}=="05a7", ATTRS{idProduct}=="4020", TAG+="uaccess"

src/device_ids.rs

@@ -3,11 +3,17 @@ use std::fmt::Display;
 const BOSE_VID: u16 = 0x05a7;
 const BOSE_HID_USAGE_PAGE: u16 = 0xff00;
 
+// TODO: It turns out that many devices share the same normal mode PID, so
+// we should at least tweak the wording that currently lists everything with
+// a PID in this list as a "compatible device". Perhaps add an additional
+// match on product string?
 const COMPATIBLE_DEVICES: &[DeviceIds] = &[
     // Bose Color II SoundLink
     bose_dev(0x40fe, 0x400d),
     // Bose SoundLink Mini II
-    bose_dev(0x40fe, 0x4009), // Same normal PID as Color II, not a typo
+    bose_dev(0x40fe, 0x4009),
+    // Bose QC35 II
+    bose_dev(0x40fe, 0x4020),
 ];
 
 // Use UsbId instead of DeviceIds since some incompatible devices don't have a concept of DFU mode.