Address SessionSharingTest failures from WV request_license_test

[ Merge of http://go/wvgerrit/17204 ]

Sleep was being employed, to introduce a delay so that one license expired
but the other was still active. The duration was long enough that
occasionally the second license would also expire, causing the test to fail.
Reduce the sleep duration to correct this behaviour.

b/27673513

Change-Id: Ieef9100c98783c16fc5ab8fe345fa1dd26604f18

libwvdrmengine/cdm/test/request_license_test.cpp

@@ -3069,7 +3069,7 @@ TEST_F(WvCdmRequestLicenseTest, SessionSharingTest) {
   EXPECT_EQ(NO_ERROR, decryptor_.Decrypt(session_id1, data->validate_key_id,
                                          decryption_parameters));
 
-  sleep(2*kSingleEncryptedSubSampleIcpLicenseExpirationWindow);
+  sleep(kSingleEncryptedSubSampleIcpLicenseExpirationWindow);
   // session 1 will be expired, shared session 3 will be used to decrypt
   EXPECT_EQ(NO_ERROR, decryptor_.Decrypt(session_id1, data->validate_key_id,
                                          decryption_parameters));