Enable presubmit for passing telephony tests

With the change to lock clocks to improve test suite stability,
re-enable presubmit running for the locally passing telephony tests.

Bug: 29579544
Change-Id: Ibdb1bf17afd1546f95c2ab5c1199693ab004af23
Test: runtest --path \
        tests/telephonytests/src/com/android/internal/telephony/dataconnection/DcTrackerTest.java
      runtest --path \
        tests/telephonytests/src/com/android/internal/telephony/dataconnection/\
	TelephonyNetworkFactoryTest.java
      runtest --path \
        tests/telephonytests/src/com/android/internal/telephony/gsm/GsmInboundSmsHandlerTest.java
      runtest --path \
        tests/telephonytests/src/com/android/internal/telephony/ServiceStateTrackerTest.java
      runtest --path \
        tests/telephonytests/src/com/android/internal/telephony/GsmCdmaCallTrackerTest.java