cherrypick from klp-docs docs: Corrected doc for getLaunchIntentForPackage()....

cherrypick from klp-docs docs: Corrected doc for getLaunchIntentForPackage(). Change-Id: I2eab0956eaedac71289e19a3618a3553908f8c38

Doc had inaccurately said that getLaunchIntentForPackage() throws an
exception if the package name is not recognized; in fact, it returns
null. Also cleaned up some style issues for that Javadoc item.

Doc is staged to:

http://asolovay.mtv:9655/reference/android/content/pm/PackageManager.html#getLaunchIntentForPackage(java.lang.String)

Bug: 15022655
Original SHA1: I2eab0956eaedac71289e19a3618a3553908f8c38

Change-Id: Ief8dfaac248ba03779c6f13237aff9b26d362fd9