SDK-1065. SDK crash in "ares_get_android_server_list"

[sergiohs84]

• Adjust compilation macros
• Avoid to initialize c-ares for Android multiple times
• Add crashlytics logs
• Avoid duplicated initialization of JVM

TODO:

1. Modify c-ares sources to include crashlytics logs, concretely at ares_get_android_server_list().
2. Prepare a patch with the differences to the original c-ares code and add it to <sdk>/patches/ares_android_c.patch
3. Modify <android>/app/src/main/jni/build.sh to
   • Download crashlytics.h from GitHub's repo
   • Add the header to <sdk>/third_party/crashlytics.h
   • Apply the patch ares_android_c.patch
   • Ensure c-ares finds the crashlytics.h at building stage