Handy tech driver updates

[FelixGruetzmacher]

Summary of the issue:

Help Tech Activator Braille display was not supported.

Description of user facing changes

Activator is now detected and can be used.

Description of development approach

Modified driver and detection logic.

Testing strategy:

Tested Braille with updated driver in developer scratchpad.

Change log entries:

Help Tech Activator now supported.

[codeofdusk]

@FelixGruetzmacher A couple of asides if I may:

• The PR title refers to "Handy Tech", but the changelog and website are "Help Tech". Was the company renamed or merged? What's the relationship between Handy Tech and Help Tech?
• I'm extremely interested in the Activator whenever it comes out! Do you have any idea of a release date yet? (feel free to email me about this at my username at gmail dot com as not to clutter the PR comments).

[AppVeyorBot]

• PASS: Translation comments check.
• PASS: Unit tests.
• FAIL: Lint check. See test results for more information.
• PASS: System tests (tags: installer NVDA).
• Build (for testing PR): https://ci.appveyor.com/api/buildjobs/5htgnpl0ic8dh7bk/artifacts/output/nvda_snapshot_pr14917-28311,b54f0095.exe
• CI timing (mins):
  INIT 0.0,
  INSTALL_START 0.8,
  INSTALL_END 0.9,
  BUILD_START 0.0,
  BUILD_END 24.7,
  TESTSETUP_START 0.0,
  TESTSETUP_END 0.3,
  TEST_START 0.0,
  TEST_END 21.7,
  FINISH_END 0.1

See test results for failed build of commit b54f0095d2

[seanbudd]

Thanks @FelixGruetzmacher