Rolled expected version number for R.

[ Merge of http://go/wvgerrit/100403 ]

VersionNumberTest.VersionNumberChangeCanary was expecting a version
string of "R".  However, Android rvc branch is now far enough into
development to use a numbered version: version "11".

Bug: 156853733
Test: Android license request test
Change-Id: I63d33f742c849b672b2d2402ab8423fdf2450f6f

libwvdrmengine/cdm/test/request_license_test.cpp

@@ -5652,7 +5652,7 @@ TEST(VersionNumberTest, VersionNumberChangeCanary) {
       android::base::GetProperty("ro.build.version.release", "");
   ASSERT_TRUE(release_number.size() > 0);
   // Reminder to change the Widevine CDM version number.
-  EXPECT_STREQ("R", release_number.c_str())
+  EXPECT_STREQ("11", release_number.c_str())
       << "The Android version number has changed. You need to update this test "
          "and also possibly update the Widevine version number in "
          "wv_android_constants.h";