tvOS Storage iTest now properly uses Caches directory (#601)

* automated testapps check for UNITY_TVOS

* add TVOS_UNITY detection to XcodeCapabilities.cs

* disable storage tests

* revert changes to dynamic links

* first draft

* testapps uses a platform config to test supplied target list

* JSON formatting

* python script formatting

* removed new line

* add storage test again

storage/testapp/Assets/Firebase/Sample/Storage/UIHandler.cs

@@ -79,7 +79,11 @@ public class UIHandler : MonoBehaviour {
     // the required dependencies to use Firebase, and if not,
     // add them if possible.
     protected virtual void Start() {
-      persistentDataPath = Application.persistentDataPath;
+#if (UNITY_TVOS)
+       persistentDataPath = Application.temporaryCachePath;
+#else
+       persistentDataPath = Application.persistentDataPath;
+#endif
       FirebaseApp.CheckAndFixDependenciesAsync().ContinueWithOnMainThread(task => {
         dependencyStatus = task.Result;
         if (dependencyStatus == DependencyStatus.Available) {

storage/testapp/Assets/Firebase/Sample/Storage/UIHandlerAutomated.cs

@@ -117,18 +117,12 @@ protected override void Start() {
         TestUploadBytesSmallFileThenUpdateMetadata,
         TestUploadStreamLargeFile,
         TestUploadStreamSmallFile,
-#if !(UNITY_TVOS)
-        // Tests which require file access don't work on tvOS.
         TestUploadFromFileLargeFile,
         TestUploadFromFileSmallFile,
-#endif
         TestUploadFromNonExistantFile,
         TestUploadBytesWithCancelation,
         TestUploadStreamWithCancelation,
-#if !(UNITY_TVOS)
-        // Tests which require file access don't work on tvOS.
         TestUploadFromFileWithCancelation,
-#endif
         TestUploadSmallFileGetDownloadUrl,
         TestGetDownloadUrlNonExistantFile,
         TestUploadSmallFileGetMetadata,
@@ -143,12 +137,9 @@ protected override void Start() {
         TestUploadSmallFileAndDownloadUsingStreamCallback,
         TestUploadLargeFileAndDownloadUsingStreamCallback,
         TestUploadLargeFileAndDownloadUsingStreamCallbackWithCancelation,
-#if !(UNITY_TVOS)
-        // Tests which require file access don't work on tvOS.
         TestUploadSmallFileAndDownloadToFile,
         TestUploadLargeFileAndDownloadToFile,
         TestUploadLargeFileAndDownloadToFileWithCancelation,
-#endif
       };
 
       testRunner = AutomatedTestRunner.CreateTestRunner(