Fix #5121 : The Testing Page on the Wiki Contains Broken Links to Cod…

…e Files (#5122)

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## Explanation

Fix #5121 : The Testing Page on the Wiki Contains Broken Links to Code
Files

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## Essential Checklist
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- [x] The PR title and explanation each start with "Fix #bugnum: " (If
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- [ ] Any changes to
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## For UI-specific PRs only
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changes. -->
If your PR includes UI-related changes, then:
- Add screenshots for portrait/landscape for both a tablet & phone of
the before & after UI changes
- For the screenshots above, include both English and pseudo-localized
(RTL) screenshots (see [RTL
guide](https://github.com/oppia/oppia-android/wiki/RTL-Guidelines))
- Add a video showing the full UX flow with a screen reader enabled (see
[accessibility
guide](https://github.com/oppia/oppia-android/wiki/Accessibility-A11y-Guide))
- Add a screenshot demonstrating that you ran affected Espresso tests
locally & that they're passing

wiki/Oppia-Android-Testing.md

@@ -275,9 +275,9 @@ While writing espresso test cases we should never use `Thread.sleep(period)` as
 
 Sometimes it may happen that test cases pass in Espresso but fail in Robolectric. Direct dependencies on Robolectric causes build failures when trying to build the test with Espresso. 
 
-In order to solve this in a clean and effective manner, we have created a [TestCoroutineDispatchers](https://github.com/oppia/oppia-android/blob/develop/testing/src/main/java/org/oppia/android/testing/TestCoroutineDispatchers.kt) using which we can provide test cases required delay weather on robolectric or espresso, both has its own implementation.  
-1. [TestCoroutineDispatchersEspressoImpl](https://github.com/oppia/oppia-android/blob/develop/testing/src/main/java/org/oppia/android/testing/TestCoroutineDispatchersEspressoImpl.kt) - Here, we are using the real-time-clock and hooking the idling resources to monitor background coroutines. 
-2. [TestCoroutineDispatchersRobolectricImpl](https://github.com/oppia/oppia-android/blob/develop/testing/src/main/java/org/oppia/android/testing/TestCoroutineDispatchersRobolectricImpl.kt) - Here, we had implemented a way using which we can run test cases in a coordinated, deterministic, and thread-safe way. 
+In order to solve this in a clean and effective manner, we have created a [TestCoroutineDispatchers](https://github.com/oppia/oppia-android/blob/develop/testing/src/main/java/org/oppia/android/testing/threading/TestCoroutineDispatchers.kt) using which we can provide test cases required delay weather on robolectric or espresso, both has its own implementation.  
+1. [TestCoroutineDispatchersEspressoImpl](https://github.com/oppia/oppia-android/blob/develop/testing/src/main/java/org/oppia/android/testing/threading/TestCoroutineDispatchersEspressoImpl.kt) - Here, we are using the real-time-clock and hooking the idling resources to monitor background coroutines. 
+2. [TestCoroutineDispatchersRobolectricImpl](https://github.com/oppia/oppia-android/blob/develop/testing/src/main/java/org/oppia/android/testing/threading/TestCoroutineDispatchersRobolectricImpl.kt) - Here, we had implemented a way using which we can run test cases in a coordinated, deterministic, and thread-safe way. 
 
 Following are the different ways you can try to pass the test cases.