tp: migrate ThreadTable, ProcessTable, AndroidLogsTable to Python

This CL introduces the actual conversion of Python generated tables to
C++ and migrates three of the trickier tables over

Change-Id: I443ea5ce823868ec974a442de3a55b83307ffa49

python/BUILD.gn

diff --git a/python/BUILD.gn b/python/BUILD.gn
index 3ea6191..6dcf9ed 100644
--- a/python/BUILD.gn
+++ b/python/BUILD.gn
@@ -17,6 +17,7 @@
 perfetto_py_library("trace_processor_table_generator") {
   sources = [
     "generators/trace_processor_table/public.py",
+    "generators/trace_processor_table/serialize.py",
     "generators/trace_processor_table/util.py",
   ]
 }