Split "helpers" from SSL target to "crypto_random" and rename

since it contains helpers mostly related to cryptographically secure random numbers and strings.

BUG=webrtc:339300437

Change-Id: I10db939534b25dc792ac1600a4721d1b84521880
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/352620
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Philipp Hancke <phancke@meta.com>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#42441}
diff --git a/api/BUILD.gn b/api/BUILD.gn
index b0f95eb..283d105 100644
--- a/api/BUILD.gn
+++ b/api/BUILD.gn
@@ -184,11 +184,11 @@
     "../p2p:p2p_constants",
     "../rtc_base:checks",
     "../rtc_base:crc32",
+    "../rtc_base:crypto_random",
     "../rtc_base:ip_address",
     "../rtc_base:logging",
     "../rtc_base:network_constants",
     "../rtc_base:socket_address",
-    "../rtc_base:ssl",
     "../rtc_base:stringutils",
     "../rtc_base/system:rtc_export",
     "//third_party/abseil-cpp/absl/base:core_headers",
diff --git a/api/candidate.cc b/api/candidate.cc
index 9a35201..4e462dd 100644
--- a/api/candidate.cc
+++ b/api/candidate.cc
@@ -13,7 +13,7 @@
 #include "absl/base/attributes.h"
 #include "p2p/base/p2p_constants.h"
 #include "rtc_base/crc32.h"
-#include "rtc_base/helpers.h"
+#include "rtc_base/crypto_random.h"
 #include "rtc_base/ip_address.h"
 #include "rtc_base/logging.h"
 #include "rtc_base/strings/string_builder.h"
diff --git a/api/transport/BUILD.gn b/api/transport/BUILD.gn
index 8a64411..8758578 100644
--- a/api/transport/BUILD.gn
+++ b/api/transport/BUILD.gn
@@ -115,11 +115,11 @@
     "../../rtc_base:byte_order",
     "../../rtc_base:checks",
     "../../rtc_base:crc32",
+    "../../rtc_base:crypto_random",
     "../../rtc_base:digest",
     "../../rtc_base:ip_address",
     "../../rtc_base:logging",
     "../../rtc_base:socket_address",
-    "../../rtc_base:ssl",
     "../../system_wrappers:metrics",
     "//third_party/abseil-cpp/absl/strings:string_view",
   ]
diff --git a/api/transport/stun.cc b/api/transport/stun.cc
index ca90515..27266d9 100644
--- a/api/transport/stun.cc
+++ b/api/transport/stun.cc
@@ -21,7 +21,7 @@
 #include "rtc_base/byte_order.h"
 #include "rtc_base/checks.h"
 #include "rtc_base/crc32.h"
-#include "rtc_base/helpers.h"
+#include "rtc_base/crypto_random.h"
 #include "rtc_base/logging.h"
 #include "rtc_base/message_digest.h"
 #include "system_wrappers/include/metrics.h"