Added CDM support for Watermarking reporting.

[ Merge of http://go/wvgerrit/148552 ]

Extended the CDM layer to report OEMCrypto's watermarking support.
The reporting of watermarking comes in three (3) mechanisms:
1) ClientCapabilities in license requests
2) CryptoSession metrics when queried to OEMCrypto
3) String property query by apps

If OEMCrypto implementents OEMCrypto_GetWatermarkingSupport(), then
the reported watermarking support by the CDM will match that of
OEMCrypto.

If OEMCrypto does not implement OEMCrypto_GetWatermarkingSupport()
or an error occurs, it is assumed that OEMCrypto does not support
watermarking, and the CDM will report "Not Supported".

Bug: 226443788
Test: run_x86_64_tests request_license_test and license_unittest
Change-Id: Id929a356c395e6bcf45d371ee6887eec40d35329

libwvdrmengine/mediadrm/aidl_src/WVDrmPlugin.cpp

@@ -1149,6 +1149,8 @@ Status WVDrmPlugin::unprovisionDevice() {
     } else {
       value = kDisable;
     }
+  } else if (name == "watermarkingSupport") {
+    status = queryProperty(wvcdm::QUERY_KEY_WATERMARKING_SUPPORT, value);
   } else {
     ALOGE("App requested unknown string property %s", name.c_str());
     *_aidl_return = value;

libwvdrmengine/mediadrm/src_hidl/WVDrmPlugin.cpp

@@ -1259,6 +1259,8 @@ Return<void> WVDrmPlugin::getPropertyString(const hidl_string& propertyName,
     } else {
       value = kDisable;
     }
+  } else if (name == "watermarkingSupport") {
+    status = queryProperty(wvcdm::QUERY_KEY_WATERMARKING_SUPPORT, value);
   } else {
     ALOGE("App requested unknown string property %s", name.c_str());
     status = Status::ERROR_DRM_CANNOT_HANDLE;