Merge pull request #21422 from wordpress-mobile/dependabot/gradle/androidx.test-core-1.6.1

Bump androidx.test:core from 1.4.0 to 1.6.1

Author: nbradbury

gradle/libs.versions.toml

@@ -29,7 +29,7 @@ androidx-recyclerview = '1.3.2'
 androidx-room = '2.6.1'
 androidx-security-crypto = '1.0.0'
 androidx-swiperefreshlayout = '1.1.0'
-androidx-test-core = '1.4.0'
+androidx-test-core = '1.6.1'
 androidx-test-espresso = '3.4.0'
 androidx-test-ext = '1.2.1'
 androidx-test-main = '1.5.0'