Add manual toggle for debug mode with extra Cusror on Target output medata

[mkrupczak3]

Currently "debug mode" with extra Cursor on Target output in openAthenaCalculationInfo is set via a flag at compile time:

OpenAthenaAndroid/app/src/main/java/com/openathena/MainActivity.java

Line 111 in 0f98c4e

public static final boolean IS_EXTENDED_COT_MODE_ACTIVE = false;

To allow for easier empirical testing by third parties, it should be made possible to toggle this option even in non-debug builds of OpenAthena for Android.

However: the increased size of CoT messages containing openAthenaCalculationInfo may make them incompatible with some software that reads in CoT messages from a small buffer size. Therefore, the debug toggle should be a subtle/hidden option that cannot be triggered accidentally