[Java] Complete the feedback widget module #106

All 109 tests pass in 2s

109 tests ±0 109 ✔️ ±0 2s ⏱️ ±0s
  15 suites ±0     0 💤 ±0
  15 files ±0     0 ❌ ±0

Results for commit 2603f37. ± Comparison against earlier commit 36fb170.