Rename T to Tiramisu

PLATFORM_VERSION_CODENAME is being updated from T to Tiramisu.

Bug: 186121492
Bug: 194055070
Test: m checkbuild
Change-Id: I6882018a916dc1c71abc442068cb54fb9c42ff3c
Merged-In: I6882018a916dc1c71abc442068cb54fb9c42ff3c
1 file changed