Increase the default wake lock timeout.

Previously the wake lock time was 5 seconds but there
are operations which take longer such as setting up
and tearing down so increase the default to 30 seconds.
Also provide TelephonyProperty.PROPERTY_WAKE_LOCK_TIMEOUT
so it can be overridden at build time.

Bug: 2268276
Change-Id: I3ae1fb196564c9fd5b9ea3e3b0927be9dd9ef255