Allows fallback to matching by name for older kernels without UNIQ.

The UNIQ ioctl was added in kernel 5.7, but other HIDRAW features have
been available since 4.19. This change allows older kernels to fallback
to matching by device name when the UNIQ ioctl fails.

If there are multiple connected devices with the same name then the API
returns failure (since it has no way to differentiate and pick just one).

Bug: 316036493
Test: atest BrailleDisplayConnectionTest
Test: Temporarily force UNIQ to return null on a test phone;
      observe that name fallback is used.
Change-Id: Iccc7d784762862b423305fbf74a97d8564e5e809