If setup fails, hang forever

Without this init will repeatedly try to start this daemon,
causing logspam.

* wait until just before tokio conversion to set O_NONBLOCK
* ensure logging code reflects source example
* log at info and higher
* use contexts for better logging
* fall back to println to work around logging problems
* remove wrong copy-pasted comment in Android.bp

Bug: 249531229
Fixes: 249566340
Test: in permissive mode, rm /dev/hw_random before start
Change-Id: Ib70cbcb048f33dca789151622d98c6d56270fa37
Merged-In: Ib70cbcb048f33dca789151622d98c6d56270fa37
(cherry picked from commit 021cf557e6cdf1ff0779e87834532c0e0e893ef8)
(cherry picked from commit 4e6fe88753fddbb4da0ffd8574c389d1255baf65)
Merged-In: Ib70cbcb048f33dca789151622d98c6d56270fa37
3 files changed