[roll] Roll cobalt [roll] Roll 4 submodules

tink 270f3bb..a7eb3f4
abseil-cpp 7c8809f..00e2693
protobuf f0dc78d..6b5d8db
protobuf-gn d686249..f218209

Removed the sources in `src/lib/util:proto_serialization` get included in the upreved protobuf_lite

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/cobalt/+/1171124
Original-Revision: 2ea35b2d40f995348f24a369732ba366fdd111ea
GitOrigin-RevId: eafec4e9c72ee614e236af42b82f73e587eeac1e
Change-Id: I73f9660cee4ce7e8f523a8e0ca95dfd8dcb8301f

Author: Anivia Li

third_party/flower

@@ -110,7 +110,7 @@
              gitsubmoduleof="fuchsia"
              path="third_party/cobalt"
              remote="https://fuchsia.googlesource.com/cobalt"
-             revision="14894bda58c88ae8ba4499901ea19108a68e2d0e"
+             revision="2ea35b2d40f995348f24a369732ba366fdd111ea"
              gerrithost="https://fuchsia-review.googlesource.com"/>
     <project name="cobalt-registry"
              gitsubmoduleof="fuchsia"