make sure glog only write to stderr using google::LogToStderr()

[rocka]

Pull request

Feature

FLAGS_logtostderr works fine on desktop environments, but on Android, it does not write to logcat, and requires to have a valid log_dir in order to write log files as well as logcat.
https://github.com/google/glog/blob/b33e3bad4c46c8a6345525fd822af355e5ef9446/src/logging.cc#L809 (only LogDestination::MaybeLogToStderr can write to logcat on Android)
https://github.com/google/glog/blob/b33e3bad4c46c8a6345525fd822af355e5ef9446/src/logging.cc#L1840 (if FLAGS_logtostderr is set, the branch above cannot be reached)

google::LogToStderr() makes the log only goes to stderr on desktop, and logcat on Android.
https://github.com/google/glog/blob/b33e3bad4c46c8a6345525fd822af355e5ef9446/src/logging.cc#L727-L734

I only tested it on Android, maybe further testing is needed.

Unit test

• Done

Manual test

• Done

Code Review

1. Unit and manual test pass
2. GitHub Action CI pass
3. At least one contributor reviews and votes
4. Can be merged clean without conflicts
5. PR will be merged by rebase upstream base

Additional Info