Update OS Version in Version Canary

(This is a merge of http://go/wvgerrit/47990)

This is a test-only change.

Bug: 78117686
Test: VersionNumberTest.*
Change-Id: I4f53358fd6eacd498ddd1df7324084d0d4ae67fe

libwvdrmengine/cdm/test/request_license_test.cpp

@@ -4505,7 +4505,7 @@ TEST(VersionNumberTest, VersionNumberChangeCanary) {
   char release_number[PROPERTY_VALUE_MAX];
   ASSERT_GT(property_get("ro.build.version.release", release_number, "Unknown"),
             0);
-  EXPECT_STREQ("P", release_number)
+  EXPECT_STREQ("9", 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.";