traced_perf: feed samples through libunwindstack

Added per-DS bookkeeping queues with the same structure of periodic tick
tasks that process a queue of unwound samples.

All the per-instance maps have the same lifetime at the moment, but I'm
keeping them separate as the ownership will become more segmented once the
unwinding is put onto a separate thread (and ProcDescriptors will be
sharded, so keeping the current name for now).

Change-Id: Id91b7f440f68317ff429060eece1754922f28594
diff --git a/Android.bp b/Android.bp
index f9bb9a8..23a15ce 100644
--- a/Android.bp
+++ b/Android.bp
@@ -7466,6 +7466,7 @@
     ":perfetto_src_base_unix_socket",
     ":perfetto_src_ipc_client",
     ":perfetto_src_ipc_common",
+    ":perfetto_src_profiling_common_unwind_support",
     ":perfetto_src_profiling_perf_proc_descriptors",
     ":perfetto_src_profiling_perf_producer",
     ":perfetto_src_profiling_perf_regs_parsing",