mac: Convert GN libs lists to frameworks in //device.

GN recently added support for Apple frameworks to link, rather than
overloading the libs lists. This pulls .frameworks out of the libs
lists, so that GN can stop supporting .frameworks in libs in the
future.

Bug: 1052560
Change-Id: I7524ffbefbad42f5ccb1d307c2019320dec37286
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2276241Reviewed-by: Reilly Grant <reillyg@chromium.org>
Commit-Queue: Robert Sesek <rsesek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#784200}

device/BUILD.gn

@@ -257,7 +257,7 @@ test("device_unittests") {
   if (is_mac) {
     deps += [ "//third_party/ocmock" ]
     ldflags = [ "-ObjC" ]
-    libs = [
+    frameworks = [
       "CoreBluetooth.framework",
       "IOBluetooth.framework",
       "IOKit.framework",

device/bluetooth/BUILD.gn

@@ -239,7 +239,7 @@ component("bluetooth") {
   }
 
   if (is_mac) {
-    libs = [
+    frameworks = [
       "IOBluetooth.framework",
       "Foundation.framework",
     ]

device/gamepad/BUILD.gn

@@ -137,7 +137,7 @@ component("gamepad") {
   }
 
   if (is_mac) {
-    libs = [
+    frameworks = [
       "CoreFoundation.framework",
       "Foundation.framework",
       "ForceFeedback.framework",