Increase meminfo dumpsys timeout

Increases the meminfo dumpsys timeout from 30s to 60s, since
30s is sometimes not enough.

Test: Check that longer timeout is used in writeDump call
Bug: 191615258
Change-Id: Ic270a81f3dde1329881023d533ffbff43a82127c
Merged-In: Ic270a81f3dde1329881023d533ffbff43a82127c
(cherry picked from commit fac7e2b5)