chore(android): drop the keyboard diagnostic, and the field only jumps if it must

The trace has served: it named the cause where two rounds of reasoning had
missed it. Out with it, and out with the viewport measurement it proved
worthless here - a value that is always zero reads as a mechanism, and the
next person would trust it.

adjustResize goes too. Measured to do nothing: Android ignores the mode for a
fullscreen window, which FMX's is. Leaving it in the manifest would suggest it
carries something.

A field already near the top of the panel - the settings ones - stays where it
is. It was visible as it was, and lifting it only moved under the eye what was
already fine.

The plan keeps what the measurement cost: on this screen, instrument first.

AndroidManifest.template.xml

@@ -63,21 +63,11 @@
 <%services%>
         <!-- Our activity is a subclass of the built-in NativeActivity framework class.
              This will take care of integrating with our NDK code. -->
-        <!-- windowSoftInputMode : LA FENETRE SE RETRECIT QUAND LE CLAVIER MONTE.
-             Sans cela il RECOUVRE la page - le cadre garde sa hauteur, le
-             contenu ne deborde de rien, et le bas du formulaire devient
-             inatteignable : le champ mot de passe ne se voyait qu'en repliant
-             le clavier. Mesure a l'appui, clavier leve : innerHeight et
-             visualViewport.height restaient tous deux a 719, et la boite
-             defilante montrait 659 pour 659 de contenu. La page n'avait aucun
-             moyen d'apprendre que le clavier existait ; c'est la fenetre qui
-             devait le dire. -->
         <activity
             android:name="com.embarcadero.firemonkey.FMXNativeActivity"
             android:exported="true"
             android:label="%activityLabel%"
             android:configChanges="orientation|keyboard|keyboardHidden|screenSize|screenLayout|uiMode"
-            android:windowSoftInputMode="adjustResize"
             android:launchMode="singleTask">
             <!-- Tell NativeActivity the name of our .so -->
             <meta-data android:name="android.app.lib_name" android:value="%libNameValue%" />