NN 1.3 HAL: ANAPIC review follow up

This CL makes the following three interface changes:
* Removes @1.3::Operand.ExtraParams, because it was the same as
  @1.2::Operand.ExtraParams
* Changes int32_t token to uint32_t for IDevice::allocate and for
  @1.3::Request.MemoryPool
* Renames OptionalTimePoint::nanoseconds to
  OptionalTimePoint::nanosecondsSinceEpoch

This CL also makes test changes in response to the interface changes,
and fixes a minor comment issue in @1.2::types.hal and @1.3::types.hal.

Bug: 148617339
Test: mma
Test: VtsHalNeuralnetworksV1_3TargetTest
Change-Id: I95b49ab34b0b79f587dda035ede700b73dc44a38
diff --git a/neuralnetworks/1.3/vts/functional/ValidateRequest.cpp b/neuralnetworks/1.3/vts/functional/ValidateRequest.cpp
index 2fd9b64..71fe97f 100644
--- a/neuralnetworks/1.3/vts/functional/ValidateRequest.cpp
+++ b/neuralnetworks/1.3/vts/functional/ValidateRequest.cpp
@@ -61,7 +61,7 @@
 
     OptionalTimePoint deadline;
     if (testDeadline) {
-        deadline.nanoseconds(std::numeric_limits<uint64_t>::max());
+        deadline.nanosecondsSinceEpoch(std::numeric_limits<uint64_t>::max());
     }
 
     // asynchronous