Verify all radio classes, instead of FM only.

Also, a bit of code cleanup.

Bug: b/33382424, b/32022455
Test: VTS
Change-Id: Ib314027b256a6ca4bfa75e9de2ba70990a00b4da
diff --git a/broadcastradio/1.0/default/BroadcastRadio.cpp b/broadcastradio/1.0/default/BroadcastRadio.cpp
index 45ffdb2..72cdc19 100644
--- a/broadcastradio/1.0/default/BroadcastRadio.cpp
+++ b/broadcastradio/1.0/default/BroadcastRadio.cpp
@@ -63,6 +63,7 @@
     if (rc != 0) {
         ALOGE("couldn't load radio module %s.%s (%s)",
               RADIO_HARDWARE_MODULE_ID, classString, strerror(-rc));
+        mStatus = Result::INVALID_ARGUMENTS;
         return;
     }
     rc = radio_hw_device_open(mod, &mHwDevice);