Add Akkhor Layout for Bengali Bangladesh

java/res/xml-sw600dp/rows_bengali_akkhor.xml

java/res/xml/kbd_bengali_akkhor.xml

java/res/xml/key_styles_currency.xml

java/res/xml/keyboard_layout_set_bengali_akkhor.xml

java/res/xml/method.xml

java/res/xml/rowkeys_bengali_akkhor1.xml

java/res/xml/rowkeys_bengali_akkhor2.xml

java/res/xml/rowkeys_bengali_akkhor3.xml

java/res/xml/rows_bengali_akkhor.xml

...oid/inputmethod/keyboard/internal/KeyboardTextsTable.java

...tmethod/keyboard/KeyboardLayoutSetSubtypesCountTests.java

.../src/com/android/inputmethod/keyboard/layout/Bengali.java

...om/android/inputmethod/keyboard/layout/BengaliAkkhor.java

.../inputmethod/keyboard/layout/tests/BengaliCustomizer.java

...oid/inputmethod/keyboard/layout/tests/TestsBengaliBD.java

...oid/inputmethod/keyboard/layout/tests/TestsBengaliIN.java

...board-text/res/values-bn-rBD/donottranslate-more-keys.xml