patchpanel: run clang-format on all files

Also enable the clang_format_presubmit check.

Command used:
clang-format -i -style=file $(find patchpanel -name '*.h' -o -name '*.cc')

BUG=b:166166797
TEST=CQ passes

Change-Id: I344cd4602a68394ba5adc5e5d58d2703eea978dc
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform2/+/2399204
Tested-by: Tom Hughes <tomhughes@chromium.org>
Reviewed-by: Hugo Benichi <hugobenichi@google.com>
Commit-Queue: Tom Hughes <tomhughes@chromium.org>
Auto-Submit: Tom Hughes <tomhughes@chromium.org>
diff --git a/patchpanel/firewall_fuzzer.cc b/patchpanel/firewall_fuzzer.cc
index 1e3bcdb..d2833d5 100644
--- a/patchpanel/firewall_fuzzer.cc
+++ b/patchpanel/firewall_fuzzer.cc
@@ -24,9 +24,7 @@
 
  private:
   // The fake's implementation always succeeds.
-  int RunInMinijail(const std::vector<std::string>& argv) override {
-    return 0;
-  }
+  int RunInMinijail(const std::vector<std::string>& argv) override { return 0; }
 
   DISALLOW_COPY_AND_ASSIGN(FakeFirewall);
 };
@@ -34,9 +32,7 @@
 }  // namespace patchpanel
 
 struct Environment {
-  Environment() {
-    logging::SetMinLogLevel(logging::LOG_FATAL);
-  }
+  Environment() { logging::SetMinLogLevel(logging::LOG_FATAL); }
 };
 
 void FuzzAcceptRules(patchpanel::FakeFirewall* fake_firewall,