Add a config file for cpplint

- cpplint is enabled in packages/services/Car.
- the config is not compatible with clang format.
- this CL will add CPPLINT.cfg to reduce the gap between cpplint and
clang format.

Bug: 148969477
Test: Create a cpp file containing lines longer than 100 character and
check if the file is caught when uploading the commit.

Change-Id: I474ccf59ec1d261bb4bd533fbddbc07f546e1f02
diff --git a/CPPLINT.cfg b/CPPLINT.cfg
new file mode 100644
index 0000000..6708d34
--- /dev/null
+++ b/CPPLINT.cfg
@@ -0,0 +1,7 @@
+set noparent
+linelength=100
+# Do not enforce including header files in both .h and .cpp.
+filter=-build/include
+# Do not check access modifier indentation.
+# CPPLint enforces +1, but our rule is no indentation.
+filter=-whitespace/indent