Disable "-readability-duplicate-include" tidy warning in generated file

/buildbot/src/android/master-plus-llvm/out/soong/.intermediates/frameworks/base/cmds/idmap2/libidmap2_protos/android_arm64_armv8-2a_cortex-a55_static/gen/proto/frameworks/base/cmds/idmap2/libidmap2/proto/fabricated_v1.pb.h:34:1: error: duplicate include [readability-duplicate-include,-warnings-as-errors]

Change-Id: I5da44b2714ce8455a4b8af7556decfc1c24c0d11
Test: presubmit