Set timeout in TimeZoneTest#testSetDefaultRace

- Addressed the comment in last CL aosp/451158
- Set 10 seconds timeout instead of 1 seconds before the CL
- remove thread priority

Bug: 62528691
Test: cts-tradefed run cts -m CtsLibcoreTestCases --test
libcore.java.util.TimeZoneTest#testSetDefaultRace

Change-Id: Ib44d51496b84900ebd69de2e2f9ec3dac6aa1eed
1 file changed