Add isPasswordObfuscated parameter to password semantics

Introduce password(isPasswordObfuscated = true) overload on
SemanticsPropertyReceiver and SemanticsProperties.IsPasswordObfuscated
to decouple visual text masking from password field identity.

Bug: 515772749
Test: ./gradlew :compose:ui:ui:updateApi
Relnote: "Add isPasswordObfuscated parameter to SemanticsPropertyReceiver.password() to allow screen readers to vocalize revealed password characters in secure text fields."
Change-Id: Ie64ba3ec2a01549109e3f4868d6feac6eabda24b