Restore can begin while clearing app data is in progress

Increasing timeout should help as in the only recent instance where we
saw this bug, it just exceeded the timeout by a second. Mostly the clear
operation happens very fast. Plus no obvious other solution to this
without major changes to BMS.

Fixes: 130347754
Test: 1) atest CtsBackupTestCases
      2) atest CtsBackupHostTestCases
      3) atest GtsBackupTestCases
      4) atest GtsBackupHostTestCases

Change-Id: I462724f2ea9a9bddd3a876e7f69302c35d69a0cb