b/434023421 Switch to new signSshPublicKey API (#1657)

* Add extra logic to handle attached service accounts
* Cut over to new API, remove code for old API
* Remove API key usage, except for tests

b/409123329 Disabling test (#1639)

Disabling OS Login-based test because the IAM propagation
delay makes it unreliable in CI.

b/397280361 Read all available output on shell channel (#1625)

When WSAWaitForMultipleEvents indicates that there's
data on the shell channel, read as much data as available
because the WSA event won't remain signalled.

This fixes an issue where the terminal output can suddenly
stall if the server produces output more quickly than the
client can read it.

b/387352724 Default to xterm-256color as $TERM (#1597)

b/374823115 Use IsContainerFullScreen for state tracking (#1534)

- Use IsContainerFullScreen instead of IsFullScreen to
  determine the connection state because IsFullScreen
  doesn't immediately reflect the correct value after
  leaving full-screen mode.
- This fixes an issue where an RDP client was left in a defunct
  state after the session timed out in full-screen mode.

b/359337410 Remove Windows 8/8.1 as supported versions from manifest (#…

…1464)

b/333952175 Fix marshalling of SendKeys parameters (#1362)

Use modified version of `IMsRdpClientNonScriptable5` interface to 
ensure proper marshalling of C array-typed parameters.

b/325652407 Use a darker accent color in dark mode (#1307)

b/319184453 RDP WebAuthn redirection (#1224)

* Add connection setting for enabling/disabling WebAuthn redirection
* Load webauthn.dll as plugin DLL when redirection enabled

b/304643218 Include IL offsets in bug report (#1151)

Include IL offset in stack trace because PDB information
is typically not available on user systems.