Address a couple of benign warnings.

Unreachable catch clauses.

libcore/ojluni/src/main/java/java/net/DatagramSocket.java:203: warning: unreachable catch clause
        } catch(IOException e) {
	          ^
 thrown type SocketException has already been caught

libcore/ojluni/src/main/java/java/security/cert/X509CertSelector.java:2217: warning: unreachable catch clause
		            } catch (CertificateException e3) {
			              ^
 thrown types CertificateNotYetValidException,CertificateExpiredException have already been caught

bug: 26110137
Change-Id: Ice1af05c88fd9b58426d4a6e926d35ee2f34afc4
2 files changed