Revert "Make outout of cppbor::parse safely mutable" am: c0145278ff am: 460e946b51

Original change: https://android-review.googlesource.com/c/platform/system/libcppbor/+/2470990

Change-Id: I4c7667dd5ccc6995fce2f4fc6d25379e7451f7cb
Signed-off-by: Automerger Merge Worker <[email protected]>