Update AccessibilityNodeInfo isPassword mapping using isPasswordObfuscated

Update AndroidComposeViewAccessibilityDelegateCompat to mark
AccessibilityNodeInfo.isPassword and text change/selection events as
not password when isPasswordObfuscated semantics is set to false.

This allows accessibility services such as TalkBack to vocalize revealed
password characters aloud to users while keeping Password semantics
intact on the node.

Bug: 515772749
Test: AndroidComposeViewAccessibilityDelegateCompatTest
Change-Id: I748250e8c5b6f44f48027e6bd13df1a61e4be4c8