Bump espresso-core from 3.3.0 to 3.4.0

Bumps espresso-core from 3.3.0 to 3.4.0.

---
updated-dependencies:
- dependency-name: androidx.test.espresso:espresso-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

app/build.gradle

@@ -305,7 +305,7 @@ dependencies {
     testImplementation "org.powermock:powermock-module-junit4:${powermockVersion}"
     testImplementation "org.powermock:powermock-api-mockito2:${powermockVersion}"
 
-    androidTestImplementation ('androidx.test.espresso:espresso-core:3.3.0', {
+    androidTestImplementation ('androidx.test.espresso:espresso-core:3.4.0', {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
     spotbugsPlugins 'com.h3xstream.findsecbugs:findsecbugs-plugin:1.11.0'