Look up optly project id dynamically to avoid breaking the build.

Author: Josh Deffibaugh

.idea/inspectionProfiles/Project_Default.xml

@@ -36,7 +36,9 @@ public void onCreate() {
         // If the project doesn't compile because you are missing R.string.optly_project_id you need
         // to put `git_ignored_strings.xml` in test-app/src/main/res/values.  This file is git ignored.
         // It contains values that are unique for each developer.
-        optimizelyManager = OptimizelyManager.builder(getResources().getString(R.string.optly_project_id))
+        final String projectId = getResources().getString(
+                getResources().getIdentifier("optly_project_id", "string", getPackageName()));
+        optimizelyManager = OptimizelyManager.builder(projectId)
                 .withEventHandlerDispatchInterval(30, TimeUnit.SECONDS)
                 .withDataFileDownloadInterval(30, TimeUnit.SECONDS)
                 .build();