Add an execution time log for VerifyClass

Some APK gets a very small duration of VerifyClass. We cannot use
systrace to profile it because the value is too small. The log
measurement can get a better precise value.

Test APK: com.babycloud.hanju
Systrace enable
VerifyClass count: 1122
Q: 365.864ms
R: 411.979ms

Systrace disable
VerifyClass count: 1122
Q: 325.234ms
R: 337.045ms
Via above results, systrace disable can get a better precise value.

Sample:
06-23 21:14:06.338  5199  5199 I babycloud.hanj: VerifyClass took
1.509ms, class: androidx.fragment.app.FragmentTransition

Test: boot
Test: Launch APP

Change-Id: I4375b42f07bc48987c3c4ffa1c155c2c748a7a65
1 file changed