Update Widevine integration test to match android version

[ Merge of https://go/wvgerrit/27860 ]

The android version was updated from "O" to "8.0.0"

b/62201928

Test: Ran wv unit and integration tests.

Change-Id: I57525af2ab3bdfa0e77ad8f0efbff26cf8ff5c32

libwvdrmengine/cdm/test/request_license_test.cpp

@@ -3612,7 +3612,7 @@ TEST(VersionNumberTest, VersionNumberChangeCanary) {
   char release_number[PROPERTY_VALUE_MAX];
   ASSERT_GT(property_get("ro.build.version.release", release_number, "Unknown"),
             0);
-  EXPECT_STREQ("O", release_number)
+  EXPECT_STREQ("8.0.0", release_number)
       << "The Android version number has changed. You need to update this test "
          "and also possibly update the Widevine version number in "
          "properties_android.cpp.";