Indicate support for initial_renewal_delay_base

[ Merge of http://go/wvgerrit/174555 ]

This is only announced if OEMCrypto is v18+

Bug: 278751387
Test: Duration use case tests, wvts tests
Change-Id: I5cbfcc733ed2af2c940fde381b40a5be850e7e88

libwvdrmengine/cdm/core/src/license_protocol.proto

@@ -1149,6 +1149,9 @@ message ClientIdentification {
     // Support is optional.
     // Value is only required to be set for license requests.
     optional WatermarkingSupport watermarking_support = 13;
+    // Indicate whether or not `initial_renewal_delay_base` is supported by the
+    // client.
+    optional bool initial_renewal_delay_base = 14 [default = false];
   }
 
   message ClientCredentials {