Move to_queued_task.h and pending_task_safety_flag.h into public API

Bug: b/235812579
Change-Id: I9fa3dc4a65044df8b44fff4e9bfeac7233fa381c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/266080
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#37248}

rtc_base/BUILD.gn

diff --git a/rtc_base/BUILD.gn b/rtc_base/BUILD.gn
index fb8187d..b58b4a9 100644
--- a/rtc_base/BUILD.gn
+++ b/rtc_base/BUILD.gn
@@ -608,8 +608,8 @@
   deps = [
     ":macromagic",
     "../api/task_queue",
+    "../api/task_queue:to_queued_task",
     "system:rtc_export",
-    "task_utils:to_queued_task",
   ]
   absl_deps = [ "//third_party/abseil-cpp/absl/memory" ]
 }
@@ -946,11 +946,11 @@
     "../api:scoped_refptr",
     "../api:sequence_checker",
     "../api/task_queue",
+    "../api/task_queue:pending_task_safety_flag",
+    "../api/task_queue:to_queued_task",
     "synchronization:mutex",
     "system:no_unique_address",
     "system:rtc_export",
-    "task_utils:pending_task_safety_flag",
-    "task_utils:to_queued_task",
     "third_party/sigslot",
   ]
   if (is_android) {
@@ -1089,6 +1089,8 @@
     "../api:sequence_checker",
     "../api/numerics",
     "../api/task_queue",
+    "../api/task_queue:pending_task_safety_flag",
+    "../api/task_queue:to_queued_task",
     "../api/transport:field_trial_based_config",
     "../system_wrappers:field_trial",
     "memory:always_valid_pointer",
@@ -1098,9 +1100,7 @@
     "system:inline",
     "system:no_unique_address",
     "system:rtc_export",
-    "task_utils:pending_task_safety_flag",
     "task_utils:repeating_task",
-    "task_utils:to_queued_task",
     "third_party/base64",
     "third_party/sigslot",
   ]
@@ -1376,13 +1376,13 @@
     ":stringutils",
     ":threading",
     ":timeutils",
+    "../api/task_queue:to_queued_task",
     "../api/units:time_delta",
     "../api/units:timestamp",
     "../test:scoped_key_value_config",
     "memory:always_valid_pointer",
     "memory:fifo_buffer",
     "synchronization:mutex",
-    "task_utils:to_queued_task",
     "third_party/sigslot",
   ]
   absl_deps = [
@@ -1407,7 +1407,7 @@
     ":rtc_task_queue",
     "../api/task_queue",
     "../api/task_queue:default_task_queue_factory",
-    "task_utils:to_queued_task",
+    "../api/task_queue:to_queued_task",
   ]
   absl_deps = [ "//third_party/abseil-cpp/absl/strings" ]
 }
@@ -1594,6 +1594,7 @@
         "../api:make_ref_counted",
         "../api:scoped_refptr",
         "../api/numerics",
+        "../api/task_queue:to_queued_task",
         "../api/units:time_delta",
         "../system_wrappers",
         "../test:fileutils",
@@ -1603,7 +1604,6 @@
         "containers:unittests",
         "memory:unittests",
         "synchronization:mutex",
-        "task_utils:to_queued_task",
         "third_party/base64",
         "third_party/sigslot",
       ]
@@ -1735,7 +1735,9 @@
         "../api:array_view",
         "../api:make_ref_counted",
         "../api/task_queue",
+        "../api/task_queue:pending_task_safety_flag",
         "../api/task_queue:task_queue_test",
+        "../api/task_queue:to_queued_task",
         "../test:field_trial",
         "../test:fileutils",
         "../test:rtc_expect_death",
@@ -1744,8 +1746,6 @@
         "../test:test_support",
         "memory:fifo_buffer",
         "synchronization:mutex",
-        "task_utils:pending_task_safety_flag",
-        "task_utils:to_queued_task",
         "third_party/sigslot",
       ]
       if (enable_google_benchmarks) {