Use uint64_t instead of long long as API type for consistent reason.

Bug: 74118023
Test: manual
Change-Id: Icd5f506c76d3a008a79cb6c9d2061962ca7fdd40
diff --git a/cmds/incidentd/src/PrivacyBuffer.cpp b/cmds/incidentd/src/PrivacyBuffer.cpp
index ee57f4d..73ee1cb 100644
--- a/cmds/incidentd/src/PrivacyBuffer.cpp
+++ b/cmds/incidentd/src/PrivacyBuffer.cpp
@@ -91,7 +91,7 @@
     // current field is message type and its sub-fields have extra privacy policies
     uint32_t msgSize = mData.readRawVarint();
     size_t start = mData.rp()->pos();
-    long long token = mProto.start(encode_field_id(policy));
+    uint64_t token = mProto.start(encode_field_id(policy));
     while (mData.rp()->pos() - start != msgSize) {
         status_t err = stripField(policy, spec, depth + 1);
         if (err != NO_ERROR) return err;