Update Android port

Update Android port

* lisp/calc/calc.el (calc-mode, calc): Make sure the on-screen
keyboard is not hidden when a Calc buffer is created or a Calc
Trail window is being created for the first time.
* lisp/touch-screen.el (touch-screen-window-selection-changed):
Take touch-screen-display-keyboard in to account.

* src/sfnt.c (sfnt_decompose_compound_glyph)
(sfnt_interpret_compound_glyph_1): Reset `defer_offsets' before
processing each component.
(sfnt_lerp_half): Avoid undefined shift of negative value.
(sfnt_compute_tuple_scale): Pacify compiler warning.