adb: don't pass time_point::max to condition_variable::wait_until.

libstdc++ implements wait_until by calculating the offset between its
default clock and the clock that it's given by calling now() on each
and subtracting, and then adds that offset to the time_point argument.
When time_point::max is used, this overflows, resulting in the
reconnection thread spinning.

Test: wine adb.exe server nodaemon
Change-Id: Ife58f0aad14bc44c0804483d3ff2351c28b3d576