universal7885: FMRadio: Fix crash and freq mismatch

- For ChannelListFragment, check if the fragment is added to an Activity and run requireactivity()
- For MainFragment, re-fetch the freq every time that fragment is drawn

universal7885-common/apps/FMRadio/src/com/eurekateam/fmradio/fragments/ChannelListFragment.kt

@@ -62,12 +62,14 @@ class ChannelListFragment :
             object : IWaitUntil {
                 override fun cond(): Boolean = mNativeIF.mDefaultCtl.getValue(GetType.GET_TYPE_FM_MUTEX_LOCKED) == 0
                 override fun todo() {
-                    (requireActivity() as MainActivity).getMySupportFragmentManager().apply {
-                        beginTransaction().remove(this@ChannelListFragment).commit()
-                        executePendingTransactions()
-                        beginTransaction().add(R.id.container_view, this@ChannelListFragment).commit()
+                    if (isAdded()) {
+                        (requireActivity() as MainActivity).getMySupportFragmentManager().apply {
+                            beginTransaction().remove(this@ChannelListFragment).commit()
+                            executePendingTransactions()
+                             beginTransaction().add(R.id.container_view, this@ChannelListFragment).commit()
+                        }
+                        requireActivity().window.clearFlags(WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE)
                     }
-                    requireActivity().window.clearFlags(WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE)
                 }
             }
         )

universal7885-common/apps/FMRadio/src/com/eurekateam/fmradio/fragments/MainFragment.kt

@@ -142,6 +142,9 @@ class MainFragment :
                }
            )
            mFreqSearchDone = true
+        } else {
+           val mNewFreq = mFMInterface.mDefaultCtl.getValue(GetType.GET_TYPE_FM_FREQ)
+           mFMFreq.text = mCleanFormat.format(mNewFreq.toFloat() / 1000)
         }
         // Update track list and fav button
         return mRootView