Replace the android support annotation library with androidx's one.

This change does not affect downstream dependencies as androidx.annotation
is fully compatible with android.support.annotation.

Bug: webrtc:11962
Change-Id: I714b473df8d0fee8000ddf3a9beca7c5613db5ff
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/226881
Commit-Queue: Xavier Lepaul‎ <xalep@webrtc.org>
Reviewed-by: Xavier Lepaul‎ <xalep@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#34839}
diff --git a/examples/BUILD.gn b/examples/BUILD.gn
index 0a7eabd..8dd998c 100644
--- a/examples/BUILD.gn
+++ b/examples/BUILD.gn
@@ -150,7 +150,7 @@
       "../sdk/android:video_api_java",
       "../sdk/android:video_java",
       "androidapp/third_party/autobanh:autobanh_java",
-      "//third_party/android_deps:com_android_support_support_annotations_java",
+      "//third_party/androidx:androidx_annotation_annotation_java",
     ]
   }
 
@@ -864,7 +864,7 @@
       "../sdk/android:peerconnection_java",
       "../sdk/android:video_api_java",
       "../sdk/android:video_java",
-      "//third_party/android_deps:com_android_support_support_annotations_java",
+      "//third_party/androidx:androidx_annotation_annotation_java",
     ]
   }
 
@@ -880,7 +880,7 @@
       "../rtc_base:base_java",
       "../sdk/android:libjingle_peerconnection_java",
       "../sdk/android:libjingle_peerconnection_metrics_default_java",
-      "//third_party/android_deps:com_android_support_support_annotations_java",
+      "//third_party/androidx:androidx_annotation_annotation_java",
     ]
   }