Fix #3396 and #3397: Implement Show All Hints and Solution Feature

[yashraj-01]

Explanation

Fixes #3396.
Fixes #3397.
Implemented feature to show all hints and solution.

Screenshots

• When the feature is disabled:

Untitled.mp4

• When the feature is enabled:

Untitled.1.mp4

• Espresso tests passing for DeveloperOptionsFragmentTest
  

Checklist

• The PR title starts with "Fix #bugnum: ", followed by a short, clear summary of the changes. (If this PR fixes part of an issue, prefix the title with "Fix part of #bugnum: ...".)
• The PR explanation includes the words "Fixes #bugnum: ..." (or "Fixes part of #bugnum" if the PR only partially fixes an issue).
• The PR follows the style guide.
• The PR does not contain any unnecessary auto-generated code from Android Studio.
• The PR is made from a branch that's not called "develop".
• The PR is made from a branch that is up-to-date with "develop".
• The PR's branch is based on "develop" and not on any other branch.
• The PR is assigned to an appropriate reviewer in both the Assignees and the Reviewers sections.

[yashraj-01]

Thanks @yashraj-01! Per CI it seems HintsAndSolutionDebugModuleTest is failing. Please be sure to double check all changed tests are passing locally before sending the PR back for review to save time waiting on CI.

Overall, the PR looks pretty close to LGTM but I had a few more suggestions & nits. PTAL.

Yes. I just saw that the test was failing. It was due to the change in FactoryDebugImpl. I'll correct the tests in a few minutes. Apologies for the delay.

[oppiabot]

Unassigning @yashraj-01 since a re-review was requested. @yashraj-01, please make sure you have addressed all review comments. Thanks!

[anandwana001]

Not codeowner but reviewed my last test function name suggestion.

[yashraj-01]

Not codeowner but reviewed my last test function name suggestion.

Thanks @anandwana001. Unassigning you now.

[yashraj-01]

org.oppia.android.domain.platformparameter.syncup.PlatformParameterSyncUpWorkerTest > testSyncUpWorker_databaseIsNotEmpty_getCorrectPlatformParameters_verifyValuesAreUpdated FAILED expected: SUCCEEDED but was : RUNNING at org.oppia.android.domain.platformparameter.syncup.PlatformParameterSyncUpWorkerTest.testSyncUpWorker_databaseIsNotEmpty_getCorrectPlatformParameters_verifyValuesAreUpdated(PlatformParameterSyncUpWorkerTest.kt:240)

This test was failing even when I re-ran the tests. I don't think this PR affects this test.

[yashraj-01]

There was another failure on Bazel StateFragmentLocalTest. This test was passing before and is passing locally. So, I have re-run the Bazel tests to see if it is broken by this PR or not (though I don't think this PR is affecting StateFragmentLocalTest).

[yashraj-01]

There was another failure on Bazel StateFragmentLocalTest. This test was passing before and is passing locally. So, I have re-run the Bazel tests to see if it is broken by this PR or not (though I don't think this PR is affecting StateFragmentLocalTest).

This passed after re-running.

[BenHenning]

Thanks @yashraj-01. Latest PR LGTM, but it seems there are still CI failures (possibly due to #3714). Could you resolve my last comment & see if a new run fixes CI? Happy to approve once CI is green.

[yashraj-01]

Thanks @yashraj-01. Latest PR LGTM, but it seems there are still CI failures (possibly due to #3714). Could you resolve my last comment & see if a new run fixes CI? Happy to approve once CI is green.

The CI checks have passed except the failing PlatformParameter test.

[BenHenning]

Thanks @yashraj-01. LGTM. Re-running the Gradle test to see if it'll pass this time.

[oppiabot]

Unassigning @BenHenning since they have already approved the PR.