Stabilized TestIdTestApp integration test

Summary:
- TestIdTestModule instrumentation tests is responsible for too many occasional crashes, e.g. https://circleci.com/gh/facebook/react-native/7054.
This should fix the problem (will monitor over next week)

- Made file naming more consistent

- 5 retries don't make e2e tests more stable, reduced back to 3 but I need to investigate how to make it more reliable
Closes https://github.com/facebook/react-native/pull/7784

Differential Revision: D3354444

fbshipit-source-id: d058362edbec09522a4828998e01988a82a74487

scripts/run-android-ci-instrumentation-tests.js

@@ -42,8 +42,10 @@ let exitCode = 0;
 testClasses.forEach((testClass) => {
   if (tryExecNTimes(
     () => {
+      echo(`Starting ${testClass}`);
+      // any faster means Circle CI crashes
       exec('sleep 10s');
-      return exec(`./scripts/run-android-instrumentation-tests.sh ${argv.package} ${testClass}`).code;
+      return exec(`./scripts/run-instrumentation-tests-via-adb-shell.sh ${argv.package} ${testClass}`).code;
     },
     numberOfRetries)) {
       echo(`${testClass} failed ${numberOfRetries} times`);