tree da671f804e08564e915f388ba8bab876b1a1f2dc
parent d1ee549ad9fff3c923e04dab0f9181756860ffa9
author Shuo Qian <shuoq@google.com> 1576608785 -0800
committer Shuo Qian <shuoq@google.com> 1576617156 +0000

Make ModemActivityInfo isValid system

Make ModemActivityInfo.isValid system because
 getIdleTimeMillis(), getSleepTimeMillis(), and getReceiveTimeMillis()
 are system.

Bug: 146436760
Test: build
Change-Id: Ifc1a1853fe0b7ca143ef95fe3a1abe70e2dc70d4