Update javadocs for RINEX4.0

Update the Javadocs based on doc:https://docs.google.com/document/d/1SliduwZ8TlV5kMDZpxM5CUg-Txsw3IxBe8JTnr_ZOl0/edit?resourcekey=0-HTfqV3iJLkQtaMp_lsy3Vg

Test: Change Javadoc only.
Bug: 277260039
Change-Id: Idb0f83885b3183812d54f6ec79da590c03c05b10
30 files changed