Revert^2 Move proto definitions to external/perfetto

This commit moves the layer and transaction .proto files
to external/perfetto/protos/perfetto/trace/android/.

Test: atest libsurfaceflinger_unittest && atest transactiontrace_testsuite
Bug: b/284424784
Change-Id: Ia7e446c528d188c748a800fbf16ab3b8b9a7b9d1