Use Rand instead of absl::Random

Use Nearby's common Rand() util instead of absl::Random

PiperOrigin-RevId: 495386054

presence/implementation/BUILD

@@ -270,7 +270,6 @@ cc_test(
         "//internal/platform/implementation/g3",  # build_cleaner: keep
         "//presence/implementation/mediums",
         "@com_github_protobuf_matchers//protobuf-matchers",
-        "@com_google_absl//absl/random",
         "@com_google_absl//absl/time",
         "@com_google_googletest//:gtest_main",
     ],

presence/implementation/broadcast_manager.cc

@@ -18,6 +18,7 @@
 #include <utility>
 #include <vector>
 
+#include "internal/crypto/random.h"
 #include "presence/implementation/advertisement_factory.h"
 
 namespace nearby {
@@ -157,7 +158,7 @@ void BroadcastManager::StopBroadcast(BroadcastSessionId id) {
 }
 
 BroadcastSessionId BroadcastManager::GenerateBroadcastSessionId() {
-  return absl::Uniform<BroadcastSessionId>(bit_gen_);
+  return ::crypto::RandData<BroadcastSessionId>();
 }
 
 void BroadcastManager::BroadcastSessionState::SetAdvertisingSession(

presence/implementation/broadcast_manager.h

@@ -21,7 +21,6 @@
 #include <vector>
 
 #include "absl/base/thread_annotations.h"
-#include "absl/random/random.h"
 #include "absl/strings/string_view.h"
 #include "internal/platform/single_thread_executor.h"
 #include "internal/proto/credential.pb.h"
@@ -89,7 +88,6 @@ class BroadcastManager {
       ABSL_EXCLUSIVE_LOCKS_REQUIRED(*executor_);
   absl::flat_hash_map<BroadcastSessionId, BroadcastSessionState> sessions_
       ABSL_GUARDED_BY(*executor_);
-  absl::BitGen bit_gen_;
 };
 
 }  // namespace presence

presence/implementation/mediums/BUILD

@@ -28,7 +28,6 @@ cc_library(
     deps = [
         "//internal/platform:comm",
         "//internal/platform:uuid",
-        "//internal/platform/implementation:comm",
         "//presence:types",
     ],
 )
@@ -42,7 +41,6 @@ cc_test(
     shard_count = 16,
     deps = [
         ":mediums",
-        "//internal/platform:base",
         "//internal/platform:comm",
         "//internal/platform:test_util",
         "//internal/platform:types",
@@ -51,8 +49,6 @@ cc_test(
         "//internal/platform/implementation/g3",  # build_cleaner: keep
         "//presence:types",
         "@com_github_protobuf_matchers//protobuf-matchers",
-        "@com_google_absl//absl/strings",
-        "@com_google_absl//absl/time",
         "@com_google_googletest//:gtest_main",
     ],
 )

presence/implementation/scan_manager.cc

@@ -21,8 +21,8 @@
 #include <utility>
 #include <vector>
 
-#include "absl/random/random.h"
 #include "absl/types/variant.h"
+#include "internal/crypto/random.h"
 #include "internal/platform/future.h"
 #include "internal/platform/implementation/ble_v2.h"
 #include "internal/platform/implementation/credential_callbacks.h"
@@ -50,7 +50,7 @@ namespace presence {
 
 ScanSessionId ScanManager::StartScan(ScanRequest scan_request,
                                      ScanCallback cb) {
-  ScanSessionId id = absl::Uniform<BroadcastSessionId>(bit_gen_);
+  ScanSessionId id = ::crypto::RandData<ScanSessionId>();
   RunOnServiceControllerThread(
       "start-scan",
       [this, id, scan_request, scan_callback = std::move(cb)]()

presence/implementation/scan_manager.h

@@ -21,7 +21,6 @@
 #include <utility>
 
 #include "absl/container/flat_hash_map.h"
-#include "absl/random/random.h"
 #include "internal/platform/single_thread_executor.h"
 #include "internal/proto/credential.pb.h"
 #include "presence/data_types.h"
@@ -86,7 +85,6 @@ class ScanManager {
   absl::flat_hash_map<ScanSessionId, ScanSessionState> scan_sessions_
       ABSL_GUARDED_BY(*executor_);
   SingleThreadExecutor* executor_;
-  absl::BitGen bit_gen_;
 };
 
 }  // namespace presence

presence/implementation/scan_manager_test.cc

@@ -25,7 +25,6 @@
 #include "gmock/gmock.h"
 #include "protobuf-matchers/protocol-buffer-matchers.h"
 #include "gtest/gtest.h"
-#include "absl/random/random.h"
 #include "absl/time/time.h"
 #include "internal/platform/bluetooth_adapter.h"
 #include "internal/platform/count_down_latch.h"