This cl does the following things:

0) Implements a skeleton of incident_helper
1) Implements FileSection class which calls incident_helper to parse
   file content to protobuf
2) Adds Kernel Wake Sources to incident.proto and makes it parsed by
   FileSection
3) Adds basic gtests to test FdBuffer, io_utils, FileSection
implementation

Bug: 62923266
Bug: 62926061
Test: manual - push incidentd, incident_helper and incident to my device
      and verify kernel wakeup sources file is able to be parsed.
Change-Id: I2aa6b6158d962ce70e6fa6c8a9c42213a45ff41c
diff --git a/cmds/incidentd/README.md b/cmds/incidentd/README.md
new file mode 100644
index 0000000..daa3924
--- /dev/null
+++ b/cmds/incidentd/README.md
@@ -0,0 +1,17 @@
+# incidentd
+
+## How to build, deploy, unit test
+
+For the first time, build the test and create an empty directly on device:
+
+```
+root$ make -j incidentd_test && adb shell mkdir /data/nativetest64/incidentd_test
+```
+
+Run the test on a device
+
+```
+root$ mmm -j frameworks/base/cmds/incidentd && \
+adb push $OUT/data/nativetest64/incidentd_test/* /data/nativetest64/incidentd_test/ && \
+adb shell /data/nativetest64/incidentd_test/incidentd_test 2>/dev/null
+```