Create new token types for DRM reprovisioning

Creates new token types for the DRM reprovisioning scheme that will be
used by L3 CDMs with baked-in certificates to allow for use of unique
serial numbers.

- Create new `CdmClientTokenType` for DRM reprovisioning in the CDM
  core.
- Create a new `ProvisioningType` for DRM reprovisioning in the
  provisioning message proto.
- Create new enum value for `DEVICE_EMBEDDED` in DrmCertificate type.
- Update uses of the above to include the new token types.

Bug: b/305093063
Merged from https://widevine-internal-review.googlesource.com/186934

Change-Id: I7e6cc8744b80cbbb624d31e5be1eab1be8a9680f

libwvdrmengine/cdm/core/src/license_protocol.proto

@@ -1026,6 +1026,8 @@ message SignedProvisioningMessage {
     ARCPP_PROVISIONING = 4;  // ChromeOS/Arc++ devices.
     // Android-Attestation-based OTA keyboxes.
     ANDROID_ATTESTATION_KEYBOX_OTA = 6;
+    // Certificate reprovisioning for internal L3 CDMs only.
+    DRM_REPROVISIONING = 7;
     INTEL_SIGMA_101 = 101;  // Intel Sigma 1.0.1 protocol.
     INTEL_SIGMA_210 = 210;  // Intel Sigma 2.1.0 protocol.
   }
@@ -1270,6 +1272,9 @@ message DrmCertificate {
     DEVICE = 2;
     SERVICE = 3;
     PROVISIONER = 4;
+    // Only used by baked-in certificates with internal L3 CDMs that support
+    // Drm Reprovisioning.
+    DEVICE_EMBEDDED = 5;
   }
   enum ServiceType {
     UNKNOWN_SERVICE_TYPE = 0;