Android: Don't crash when dis- and reconnecting phone via USB

When ADB signals a change about the list of connected devices, the whole build/run steps tree gets deleted and recreated.

The AndroidBuildApkStep is a part of that tree and starts one or more
"keytool" processes on creation/init. They were started with their own
event loop. Those synthetic event loops caused a change in order of
deletion which led to crashes with obscure backtraces.

This change removes the event loop creation from "keytool" calls. The
crash is avoided.

The calls take ~0.5 seconds. The short UI freeze should be an acceptable
hotfix trade-off for a crash in QtC13. If 0.5 seconds freeze seem too
much, a better fix could be done in QtC 14.

Fixes: QTCREATORBUG-30645
Fixes: QTCREATORBUG-30770
Change-Id: I8842dc87023142ae75572bf255c7f1ec808d9bab
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>

src/plugins/android/androidcreatekeystorecertificate.cpp

@@ -275,7 +275,7 @@ void AndroidCreateKeystoreCertificate::buttonBoxAccepted()
     Process genKeyCertProc;
     genKeyCertProc.setCommand(command);
     using namespace std::chrono_literals;
-    genKeyCertProc.runBlocking(15s, EventLoopMode::On);
+    genKeyCertProc.runBlocking(15s);
 
     if (genKeyCertProc.result() != ProcessResult::FinishedWithSuccess) {
         QMessageBox::critical(this, Tr::tr("Error"),