Yes, having more women in the Indian police force will make women feel safer, because there will be women to interact with the public. The women will represent the women's interests and points of view. There will be less corruption as well, because there are women in the force to make sure that there is not systematic sexism.
Eliminating the root cause of gang rapes and extreme violence against women in India will be the only way women will feel safer. Raping someone usually comes from the need for control. Millions of Indians' lives are so out of control with rampant poverty, the only way to give these desperate people some measure of control is to ease extreme poverty in the world's largest democracy.