SSLParameters.getDefaultTrustManager() should lazily initialize its value

Make SSLParametersImpl's defaultKeyManager, defaultTrustManager,
defaultSecureRandom, and defaultParameters all use the single check
idiom for initialization. Move such initialization for
defaultKeyManager and defaultTrustManager out of SSLParametersImpl
constructor into static functions, replacing original
getDefaultTrustManager simple accessor with code that performs lazy
initialization.

	luni/src/main/java/org/apache/harmony/xnet/provider/jsse/SSLParametersImpl.java

dirrect -> direct
	luni/src/main/java/org/apache/harmony/xnet/provider/jsse/SSLParametersImpl.java
	luni/src/main/java/org/apache/harmony/xnet/provider/jsse/SSLSocketImpl.java

hanshake -> handshake
	luni/src/main/java/org/apache/harmony/xnet/provider/jsse/SSLRecordProtocol.java
	luni/src/main/java/org/apache/harmony/xnet/provider/jsse/HandshakeProtocol.java
	luni/src/main/java/org/apache/harmony/xnet/provider/jsse/SSLSocketImpl.java

Bug: 2954292
Change-Id: I19bae541613666903b57fccf3e8bfef65b74d6cf