Add event log assertions to flicker dsl

- Replaces asserts wtih junit.framework.Assert since the assert may be a noop if runtime assertions have not been enabled on the JVM
- Fixes EventLogMonitor as well (tests were passing when they shouldn't have been ebcause of the assert)

Test: atest FlickerLibTest
Bug: 151179149
Change-Id: Ice7afad08534729fcdeaa45dc06a3f64d83d69b3
12 files changed
tree: 6eab0b4dc0a9b99b65dbcf45957ebb4b659caef4
  1. build/
  2. docs/
  3. emu_test/
  4. libraries/
  5. scripts/
  6. tests/
  7. utils/
  8. PREUPLOAD.cfg