Bump robolectric from 4.7.2 to 4.7.3 (#4428)

Bumps [robolectric](https://github.com/robolectric/robolectric) from 4.7.2 to 4.7.3.
- [Release notes](https://github.com/robolectric/robolectric/releases)
- [Commits](robolectric/robolectric@robolectric-4.7.2...robolectric-4.7.3)

---
updated-dependencies:
- dependency-name: org.robolectric:robolectric
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

build.gradle

@@ -62,7 +62,7 @@ ext {
 
     androidTestVersion = '1.4.0'
     junitVersion = '4.13.2'
-    robolectricVersion = '4.7.2'
+    robolectricVersion = '4.7.3'
     mockitoCoreVersion = '4.1.0'
     mockitoKotlinVersion = '4.0.0'