For #21299: add duration markers for HomeActivity Create/Start.

We only instrument these methods because they're the only ones that
noticeably long running in the current implementation.

app/src/main/java/org/mozilla/fenix/HomeActivity.kt

@@ -95,6 +95,7 @@ import org.mozilla.fenix.library.bookmarks.DesktopFolders
 import org.mozilla.fenix.library.history.HistoryFragmentDirections
 import org.mozilla.fenix.library.recentlyclosed.RecentlyClosedFragmentDirections
 import org.mozilla.fenix.onboarding.DefaultBrowserNotificationWorker
+import org.mozilla.fenix.perf.MarkersLifecycleCallbacks
 import org.mozilla.fenix.perf.Performance
 import org.mozilla.fenix.perf.PerformanceInflater
 import org.mozilla.fenix.perf.ProfilerMarkers
@@ -179,6 +180,9 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
     private lateinit var startupTypeTelemetry: StartupTypeTelemetry
 
     final override fun onCreate(savedInstanceState: Bundle?) {
+        // DO NOT MOVE ANYTHING ABOVE THIS getProfilerTime CALL.
+        val startTimeProfiler = components.core.engine.profiler?.getProfilerTime()
+
         components.strictMode.attachListenerToDisablePenaltyDeath(supportFragmentManager)
         // There is disk read violations on some devices such as samsung and pixel for android 9/10
         components.strictMode.resetAfter(StrictMode.allowThreadDiskReads()) {
@@ -266,6 +270,9 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
             components.core.pocketStoriesService.startPeriodicStoriesRefresh()
         }
 
+        components.core.engine.profiler?.addMarker(
+            MarkersLifecycleCallbacks.MARKER_NAME, startTimeProfiler, "HomeActivity.onCreate"
+        )
         StartupTimeline.onActivityCreateEndHome(this) // DO NOT MOVE ANYTHING BELOW HERE.
     }
 
@@ -316,6 +323,9 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
     }
 
     override fun onStart() {
+        // DO NOT MOVE ANYTHING ABOVE THIS getProfilerTime CALL.
+        val startProfilerTime = components.core.engine.profiler?.getProfilerTime()
+
         super.onStart()
 
         // Diagnostic breadcrumb for "Display already aquired" crash:
@@ -325,6 +335,9 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
         )
 
         ProfilerMarkers.homeActivityOnStart(binding.rootContainer, components.core.engine.profiler)
+        components.core.engine.profiler?.addMarker(
+            MarkersLifecycleCallbacks.MARKER_NAME, startProfilerTime, "HomeActivity.onStart"
+        ) // DO NOT MOVE ANYTHING BELOW THIS addMarker CALL.
     }
 
     override fun onStop() {

app/src/main/java/org/mozilla/fenix/perf/MarkersLifecycleCallbacks.kt

@@ -7,6 +7,7 @@ package org.mozilla.fenix.perf
 import android.app.Activity
 import android.os.Bundle
 import mozilla.components.concept.engine.Engine
+import org.mozilla.fenix.HomeActivity
 import org.mozilla.fenix.IntentReceiverActivity
 import org.mozilla.fenix.android.DefaultActivityLifecycleCallbacks
 
@@ -26,7 +27,8 @@ class MarkersLifecycleCallbacks(
 
     override fun onActivityCreated(activity: Activity, bundle: Bundle?) {
         if (shouldSkip() ||
-            // This method is manually instrumented with duration.
+            // These methods are manually instrumented with duration.
+            activity is HomeActivity ||
             activity is IntentReceiverActivity
         ) {
             return
@@ -35,7 +37,12 @@ class MarkersLifecycleCallbacks(
     }
 
     override fun onActivityStarted(activity: Activity) {
-        if (shouldSkip()) { return }
+        if (shouldSkip() ||
+            // These methods are manually instrumented with duration.
+            activity is HomeActivity
+        ) {
+            return
+        }
         engine.profiler?.addMarker(MARKER_NAME, "${activity::class.simpleName}.onStart (via callbacks)")
     }