Added first set of country flags

.../main/res/drawable/ic_submission_country_flag_austria.xml

...rc/main/res/drawable/ic_submission_country_flag_czech.xml

.../main/res/drawable/ic_submission_country_flag_denmark.xml

.../main/res/drawable/ic_submission_country_flag_estonia.xml

.../main/res/drawable/ic_submission_country_flag_ireland.xml

...rc/main/res/drawable/ic_submission_country_flag_italy.xml

...c/main/res/drawable/ic_submission_country_flag_latvia.xml

...n/res/drawable/ic_submission_country_flag_netherlands.xml

...c/main/res/drawable/ic_submission_country_flag_poland.xml

...rc/main/res/drawable/ic_submission_country_flag_spain.xml