Android: Remove various waitForFinished(-1)

That waits forever. For processes that should finish in a reasonable
time, we should not wait forever. I changed most of the waits to 5s,
all of those functions do handle a failed waitForFinished. I doubt
that all callers do also handle it correctly, but that's probably
still better than waiting forever.

Task-number: QTCREATORBUG-10868
Change-Id: I368a911f19a4f81d71b24cf9d58796bd99878040
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>