Adding assumeTrue() to setUp() instead of setUpClass() function

assumeTrue() for multi-user support check should be present in
setUp() function.
When present in setUp() function and in case multi-user is not
supported, then the test cases will be counted as assumption failure.

Bug:198262567
Test: Run BlobStoreMultiUserTest pass

Change-Id: Ia5a53135a2996a625e90eb541dd31b283a8b83e6
2 files changed