[bt][l2cap] re-format BUILD.gn

Some of stanzas in the BUILD file aren't properly sorted. Fix that.

Bug: None
Test: build

Change-Id: Ibfcc45c7d6089796a84d70ac6d7e8b85218d9280
diff --git a/src/connectivity/bluetooth/core/bt-host/l2cap/BUILD.gn b/src/connectivity/bluetooth/core/bt-host/l2cap/BUILD.gn
index 3ac04c1..150551c 100644
--- a/src/connectivity/bluetooth/core/bt-host/l2cap/BUILD.gn
+++ b/src/connectivity/bluetooth/core/bt-host/l2cap/BUILD.gn
@@ -60,8 +60,8 @@
 
   public_deps = [
     ":definitions",
-    "//src/connectivity/bluetooth/core/bt-host/hci",
     "//garnet/public/lib/fxl",
+    "//src/connectivity/bluetooth/core/bt-host/hci",
     "//zircon/public/lib/fit",
   ]
 }
@@ -80,10 +80,10 @@
 
   public_deps = [
     ":l2cap",
-    "//src/connectivity/bluetooth/core/bt-host/common",
-    "//src/connectivity/bluetooth/core/bt-host/hci",
     "//garnet/public/lib/fxl",
     "//garnet/public/lib/gtest",
+    "//src/connectivity/bluetooth/core/bt-host/common",
+    "//src/connectivity/bluetooth/core/bt-host/hci",
     "//third_party/googletest:gtest",
   ]
 }
@@ -114,9 +114,9 @@
   deps = [
     ":l2cap",
     ":testing",
+    "//garnet/public/lib/gtest",
     "//src/connectivity/bluetooth/core/bt-host/hci",
     "//src/connectivity/bluetooth/core/bt-host/testing",
-    "//garnet/public/lib/gtest",
     "//third_party/googletest:gtest",
   ]
 }