1. Doc: Update requirement IDs for Section 2
    
    - Added the explanation of the requirement ID of Section 2 in Section 1.
    - Replaced the requirement IDs with the new Section 2 Requirement ID. 
    
    Bug: 70028984
    Change-Id: Ie2c130a2350ab79f9fdec7e5c78e7e07f5126909
    
  2. Docs: Introducing the new ID and document structure
    
    - Introducing the new ID scheme that is used for the entire document.
    - Explaning the new document structure.
    
    Change-Id: I3625bc49cc79568742d950675197b8477e093ea8
    
  3. Docs: Add CDD docs and the build script, and test examples
    
    Bug: 25199595
    This is based on the amended final CDD for M, hosted as commit
    1846a9622485855d572705a7972116caf0be3669 on the AOSP master branch.
    
    Change-Id: Ic3bd96cd652f7d7b13def03a4ca1f04645c34255