Add a Clearcut tool event logger

Implement a binary that logs tool events to Clearcut. The binary is designed to be eventually called by the `run_tool_with_logging` script in the `envsetup.sh` script that sets up the build environment.

Only start and stop events are currently logged for each invocation.

Test: atest tool_event_logger_test
bug: 331638854
Change-Id: I9268e4cb986975ceda171204e6ce8ef1732eaeea
diff --git a/tools/tool_event_logger/OWNERS b/tools/tool_event_logger/OWNERS
new file mode 100644
index 0000000..b692c9e
--- /dev/null
+++ b/tools/tool_event_logger/OWNERS
@@ -0,0 +1,4 @@
+include platform/tools/asuite:/OWNERS
+
+zhuoyao@google.com
+hzalek@google.com
\ No newline at end of file