Fix old bug where termux app would crash if sessions list ListView was not notified of new sessions

To reproduce:
1. Create 2 sessions.
2. From either session, run a random `RUN_COMMAND` intent command with `am` command and shift to the other session.

Termux app would crash and throw the `The content of the adapter has changed but ListView did not receive a notification.` exception. TermuxService was previously not notifying the ListView of the sessions list that a new session has been added, if the activity was in foreground.

Author: agnostic-apollo

app/src/main/java/com/termux/app/TermuxService.java

@@ -319,6 +319,11 @@ private void executeForegroundCommand(Intent intent, String executablePath, Stri
         TermuxAppSharedPreferences preferences = new TermuxAppSharedPreferences(this);
         preferences.setCurrentSession(newSession.mHandle);
 
+        // Notify {@link TermuxSessionsListViewController} that sessions list has been updated if
+        // activity in is foreground
+        if(mTermuxSessionClient != null)
+            mTermuxSessionClient.terminalSessionListNotifyUpdated();
+
         // Launch the main Termux app, which will now show the current session:
         startActivity(new Intent(this, TermuxActivity.class).addFlags(Intent.FLAG_ACTIVITY_NEW_TASK));
     }

app/src/main/java/com/termux/app/terminal/TermuxSessionClient.java

@@ -68,7 +68,7 @@ public void onTitleChanged(TerminalSession updatedSession) {
             mActivity.showToast(toToastTitle(updatedSession), true);
         }
 
-        mActivity.terminalSessionListNotifyUpdated();
+        terminalSessionListNotifyUpdated();
     }
 
     @Override
@@ -101,7 +101,7 @@ public void onSessionFinished(final TerminalSession finishedSession) {
             }
         }
 
-        mActivity.terminalSessionListNotifyUpdated();
+        terminalSessionListNotifyUpdated();
     }
 
     @Override
@@ -152,7 +152,7 @@ void noteSessionInfo() {
         TerminalSession session = mActivity.getCurrentSession();
         final int indexOfSession = mActivity.getTermuxService().getSessions().indexOf(session);
         mActivity.showToast(toToastTitle(session), false);
-        mActivity.terminalSessionListNotifyUpdated();
+        terminalSessionListNotifyUpdated();
 
         final ListView termuxSessionsListView = mActivity.findViewById(R.id.terminal_sessions_list);
         termuxSessionsListView.setItemChecked(indexOfSession, true);
@@ -178,7 +178,7 @@ public void renameSession(final TerminalSession sessionToRename) {
 
         DialogUtils.textInput(mActivity, R.string.session_rename_title, sessionToRename.mSessionName, R.string.session_rename_positive_button, text -> {
             sessionToRename.mSessionName = text;
-            mActivity.terminalSessionListNotifyUpdated();
+            terminalSessionListNotifyUpdated();
         }, -1, null, -1, null, null);
     }
 
@@ -250,7 +250,7 @@ public void removeFinishedSession(TerminalSession finishedSession) {
         TermuxService service = mActivity.getTermuxService();
 
         int index = service.removeTerminalSession(finishedSession);
-        mActivity.terminalSessionListNotifyUpdated();
+        terminalSessionListNotifyUpdated();
         if (mActivity.getTermuxService().getSessions().isEmpty()) {
             // There are no sessions to show, so finish the activity.
             mActivity.finishActivityIfNotFinishing();
@@ -262,6 +262,10 @@ public void removeFinishedSession(TerminalSession finishedSession) {
         }
     }
 
+    public void terminalSessionListNotifyUpdated() {
+        mActivity.terminalSessionListNotifyUpdated();
+    }
+
 
 
     String toToastTitle(TerminalSession session) {