fix(input): by default, do not trim input[type=password] values

Do not trim input[type=password] values

BREAKING CHANGE:

Previously, input[type=password] would trim values by default, and would require an explicit ng-trim="false"
to disable the trimming behaviour. After this CL, ng-trim no longer effects input[type=password], and will
never trim the password value.

Closes #8250
Closes #8230

Conflicts:
	src/ng/directive/input.js