Move crypto-related symbols from ::crypto:: to ::nearby::crypto:: to deconflict

them with chromium ::crypto symbols of the same names.

PiperOrigin-RevId: 684566882

internal/crypto/ed25519.cc

@@ -26,7 +26,7 @@
 #include <openssl/base.h>
 #include <openssl/evp.h>
 
-namespace crypto {
+namespace nearby::crypto {
 
 constexpr size_t kEd25519SignatureSize = 64;
 constexpr size_t kEd25519PrivateKeySize = 32;
@@ -181,4 +181,4 @@ absl::Status Ed25519Verifier::Verify(absl::string_view data,
              : absl::InternalError("Signature is invalid.");
 }
 
-}  // namespace crypto
+}  // namespace nearby::crypto

internal/crypto/ed25519.h

@@ -25,7 +25,7 @@
 #include <openssl/digest.h>
 #include <openssl/evp.h>
 
-namespace crypto {
+namespace nearby::crypto {
 
 #ifdef OPENSSL_IS_BORINGSSL
 using CryptoKeyUniquePtr = ::bssl::UniquePtr<EVP_PKEY>;
@@ -73,6 +73,6 @@ class CRYPTO_EXPORT Ed25519Verifier {
   CryptoKeyUniquePtr public_key_;
 };
 
-}  // namespace crypto
+}  // namespace nearby::crypto
 
 #endif  // THIRD_PARTY_NEARBY_INTERNAL_CRYPTO_ED25519_H_

internal/crypto/ed25519_unittest.cc

@@ -21,7 +21,7 @@
 #include "gtest/gtest.h"
 #include "absl/strings/escaping.h"
 
-namespace crypto {
+namespace nearby::crypto {
 namespace {
 
 using ::absl::StatusCode;
@@ -211,4 +211,4 @@ TEST(Ed25519SignerVerifierTest, NewKeypairFromRandomSeedRoundtrip) {
 }
 
 }  // namespace
-}  // namespace crypto
+}  // namespace nearby::crypto