Replace starts_with and ends_with with Abseil

Bug: None
Change-Id: I7eae3db1aeb81f0f1d37ff50d5c85c16ecb1f366
Reviewed-on: https://webrtc-review.googlesource.com/c/114221
Commit-Queue: Steve Anton <steveanton@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26032}
diff --git a/rtc_base/BUILD.gn b/rtc_base/BUILD.gn
index 829a5fe..1ee1ed5 100644
--- a/rtc_base/BUILD.gn
+++ b/rtc_base/BUILD.gn
@@ -1110,6 +1110,7 @@
     ":rtc_base_tests_utils",
     ":stringutils",
     "../test:test_support",
+    "//third_party/abseil-cpp/absl/strings",
   ]
 }