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

This reverts commit 4ee9b4d0c829f2e439379298c134efdfcacc4cd4.

Reason for revert: The underlying issue with having assumeTrue() in
                   setUpClass() has been fixed.

Bug: 200228519
Test: adb shell setprop fw.max_users 1
      && atest CtsBlobStoreHostTestCases
Change-Id: I6a64f7d935923049507edfdb4e1e832dcffbe3a0
2 files changed