Perfprofd: Add a symbolizer based on simpleperf code

For the time being, compile a small library straight out of
simpleperf sources. Once simpleperf has been transitioned to
Soong, use it directly.

Test: m
Change-Id: I2aa4695fda97ce424b9e9382db4346b8b0e38d2a
diff --git a/perfprofd/config.h b/perfprofd/config.h
index 219db06..bbbcb3f 100644
--- a/perfprofd/config.h
+++ b/perfprofd/config.h
@@ -90,6 +90,9 @@
   bool collect_booting = true;
   bool collect_camera_active = false;
 
+  // If true, use an ELF symbolizer to on-device symbolize.
+  bool use_elf_symbolizer = true;
+
   // Sleep for the given number of seconds.
   virtual void Sleep(size_t seconds) = 0;