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On systems with both the built-in serial driver and a third-party driver
the same port can be enumerated more than once. This difference is
visible to the user in the device path shown in the chooser but was
previously ignored when constructing a persistent ID for the port.

This patch replaces the generic persistent ID field with the individual
components that are available on each platform. This should make it
easier to modify these rules over time as the components won't be opaque
to SerialChooserContext. This is a breaking change which will cause
previously granted persistent permissions to be ignored.

On macOS the name of the USB driver (the parent of the BSD serial
port) is now included in the set of fields used to identify a device in
order to differentiate between USB devices with otherwise have the same
USB vendor ID, product ID and serial number.

Bug: 1127535
Change-Id: If1b06ab82a975976e1e3b7d2075216f11afda5dd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2413176
Commit-Queue: Reilly Grant <reillyg@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: James Hollyer <jameshollyer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#811028}