Increase timeout for ADB backup/restore of SharedStorage.

It previously used a backup timeout of 5 min, and restore timeout of 1
min, that would always timeout if the files on shared storage were big.
Now increase both to 60 minutes.

Bug: 37201952

Test: adb backup -shared && adb restore backup.ab

Merged-In: Ice6648554933baf76e96fd151b506564487c91c6

Change-Id: I99095249e960fd47fc742154bc513347bf506548