Refactor test mode and tracking management in Branch SDK

- Updated enableTestMode and disableTestMode methods in Branch class to utilize BranchConfigurationController for better encapsulation.
- Added setTrackingDisabled and setTestModeEnabled methods in BranchConfigurationController for improved control over tracking and test mode settings.
- Enhanced null safety checks in tracking management methods.

Author: wpinho-branch

Branch-SDK/src/main/java/io/branch/referral/Branch.java

@@ -467,7 +467,11 @@ public BranchRemoteInterface getBranchRemoteInterface() {
      * </p>
      */
     public static void enableTestMode() {
-        BranchUtil.setTestMode(true);
+        if (Branch.getInstance() != null) {
+            Branch.getInstance().branchConfigurationController_.setTestModeEnabled(true);
+        } else {
+            BranchUtil.setTestMode(true);
+        }
         BranchLogger.logAlways("enableTestMode has been changed. It now uses the test key but will not" +
                 " log or randomize the device IDs. If you wish to enable logging, please invoke enableLogging." +
                 " If you wish to simulate installs, please see add a Test Device (https://help.branch.io/using-branch/docs/adding-test-devices)" +
@@ -480,7 +484,11 @@ public static void enableTestMode() {
      * </p>
      */
     public static void disableTestMode() {
-        BranchUtil.setTestMode(false);
+        if (Branch.getInstance() != null) {
+            Branch.getInstance().branchConfigurationController_.setTestModeEnabled(false);
+        } else {
+            BranchUtil.setTestMode(false);
+        }
     }
 
     /**
@@ -554,6 +562,9 @@ public static void setCDNBaseUrl(String url) {
      * with {@link Defines.BranchAttributionLevel#NONE} instead to disable tracking.
      * */
     @Deprecated public void disableTracking(boolean disableTracking, @Nullable TrackingStateCallback callback) {
+        if (branchConfigurationController_ != null) {
+            branchConfigurationController_.setTrackingDisabled(disableTracking);
+        }
         trackingController.disableTracking(context_, disableTracking, callback);
     }
 

Branch-SDK/src/main/java/io/branch/referral/BranchConfigurationController.kt

@@ -38,7 +38,7 @@ class BranchConfigurationController {
      * 
      * @return Boolean indicating if test mode is enabled
      */
-    private fun isTestModeEnabled(): Boolean {
+    fun isTestModeEnabled(): Boolean {
         return BranchUtil.isTestModeEnabled()
     }
 
@@ -48,7 +48,29 @@ class BranchConfigurationController {
      * @return Boolean indicating if tracking is disabled
      */
     fun isTrackingDisabled(): Boolean {
-        return Branch.getInstance().prefHelper_.getBool("bnc_tracking_disabled")
+        return Branch.getInstance()?.prefHelper_?.getBool("bnc_tracking_disabled") ?: false
+    }
+
+    /**
+     * Sets whether tracking should be disabled.
+     * When tracking is disabled, the SDK will not track any user data or state,
+     * and it will not initiate any network calls except for deep linking operations.
+     * 
+     * @param disabled Boolean indicating if tracking should be disabled
+     */
+    fun setTrackingDisabled(disabled: Boolean) {
+        Branch.getInstance()?.prefHelper_?.setBool("bnc_tracking_disabled", disabled)
+    }
+
+    /**
+     * Sets whether test mode should be enabled.
+     * When test mode is enabled, the SDK will use test keys and endpoints.
+     * This is useful for development and testing purposes.
+     * 
+     * @param enabled Boolean indicating if test mode should be enabled
+     */
+    fun setTestModeEnabled(enabled: Boolean) {
+        BranchUtil.setTestMode(enabled)
     }
 
     /**