Android: Allow for longer keystore alias names

This was limited to 8 characters, but I can't find any indication
that there is any reason for such a short limit.

Task-number: QTCREATORBUG-15397
Change-Id: I1d7eb3ec4403e66988b443199ce96ab89fc84c33
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@theqtcompany.com>
Reviewed-by: BogDan Vatra <bogdan@kdab.com>

src/plugins/android/androidcreatekeystorecertificate.ui

@@ -174,7 +174,7 @@
          <string notr="true"/>
         </property>
         <property name="maxLength">
-         <number>8</number>
+         <number>32</number>
         </property>
        </widget>
       </item>