Add tracking for EditorLauncher vs direct Intent launches

Adds a way to distinguish editor launches that went through EditorLauncher
vs direct Intent creation for analytics purposes.

Changes:
- EditorLauncher: Add EXTRA_LAUNCHED_VIA_EDITOR_LAUNCHER intent extra
- EditPostActivity: Track EDITOR_LAUNCHED_VIA_EDITOR_LAUNCHER when extra is present (only on initial creation, not configuration changes)
- AnalyticsTracker: Add EDITOR_LAUNCHED_VIA_EDITOR_LAUNCHER stat

Author: oguzkocer

WordPress/src/main/java/org/wordpress/android/ui/posts/EditPostActivity.kt

@@ -526,6 +526,11 @@ class EditPostActivity : BaseAppCompatActivity(), EditorFragmentActivity, Editor
         super.onCreate(savedInstanceState)
         (application as WordPress).component().inject(this)
         initializeViewModels()
+        
+        // Track if this editor launch came via EditorLauncher (only on initial creation)
+        if (savedInstanceState == null && intent.getBooleanExtra(EditorLauncher.EXTRA_LAUNCHED_VIA_EDITOR_LAUNCHER, false)) {
+            analyticsTrackerWrapper.track(Stat.EDITOR_LAUNCHED_VIA_EDITOR_LAUNCHER)
+        }
 
         setContentView(R.layout.new_edit_post_activity)
         val callback: OnBackPressedCallback = object : OnBackPressedCallback(true) {

WordPress/src/main/java/org/wordpress/android/ui/posts/EditorLauncher.kt

@@ -26,6 +26,11 @@ class EditorLauncher @Inject constructor(
     private val analyticsTrackerWrapper: AnalyticsTrackerWrapper
 ) {
     companion object {
+        /**
+         * Intent extra key to indicate the Intent was created through EditorLauncher.
+         * Used for analytics to distinguish between EditorLauncher and direct Intent creation.
+         */
+        const val EXTRA_LAUNCHED_VIA_EDITOR_LAUNCHER = "launched_via_editor_launcher"
         /**
          * Static accessor for use in static utility classes like ActivityLauncher.
          * Prefer constructor injection when possible.
@@ -88,6 +93,7 @@ class EditorLauncher @Inject constructor(
         putExtra(WordPress.SITE, params.site)
         putExtra(EditPostActivityConstants.EXTRA_IS_PAGE, params.isPage)
         putExtra(EditPostActivityConstants.EXTRA_IS_PROMO, params.isPromo)
+        putExtra(EXTRA_LAUNCHED_VIA_EDITOR_LAUNCHER, true)
     }
 
     private fun Intent.addPostExtras(params: EditorLauncherParams) {

libs/analytics/src/main/java/org/wordpress/android/analytics/AnalyticsTracker.java

@@ -210,6 +210,7 @@ public enum Stat {
         POST_LIST_VIEW_LAYOUT_TOGGLED,
         POST_LIST_SEARCH_ACCESSED,
         EDITOR_LAUNCHER,
+        EDITOR_LAUNCHED_VIA_EDITOR_LAUNCHER,
         EDITOR_CLOSED,
         EDITOR_SESSION_START,
         EDITOR_SESSION_SWITCH_EDITOR,