WVDrmPlugin: expose processorWidth

[ Merge of go/wvgerrit/c/cdm/+/177750 ]

Bug: 287093494
Test: MediaDrmParameterizedTests#testDrmPropertyStrings
Change-Id: I6d616deb69e6313c031bb3294ec3fcf62cabbacb

libwvdrmengine/mediadrm/src/WVDrmPlugin.cpp

@@ -1149,6 +1149,12 @@ Status WVDrmPlugin::unprovisionDevice() {
     status = queryProperty(wvcdm::QUERY_KEY_PRODUCTION_READY, value);
   } else if (name == "provisioningModel") {
     status = queryProperty(wvcdm::QUERY_KEY_PROVISIONING_MODEL, value);
+  } else if (name == "processorWidth") {
+#ifdef __LP64__
+    value = "64";
+#else
+    value = "32";
+#endif
   } else {
     ALOGE("App requested unknown string property %s", name.c_str());
     *_aidl_return = value;