Replace .equals(null) with == null

.equals(null) always returns false or throws
a NullPointerException.

Bug: 190944875
Test: Presubmits
Change-Id: Ic313e2b01d2d1294d25d952d9fb4e8ca4e488c85
2 files changed
tree: b3f0abf93bac16560ba8dad12f792071817fb440
  1. build/
  2. docs/
  3. emu_test/
  4. libraries/
  5. scripts/
  6. tests/
  7. utils/
  8. PREUPLOAD.cfg