Fix TextInput placeholder stuck on multiple lines

[Abbondanzo]

Summary:
On Android, when a TextInput's multiline prop changes from false to true and back to false, the placeholder stayed rendered across multiple lines instead of returning to a single line.

ReactEditText.setInputType only forced the view out of single-line mode when multiline was enabled; it never restored single-line mode when multiline was disabled. TextView.setInputType re-applies its single-line layout (max lines, horizontal scrolling) only when its internal single-line flag actually changes, and because we toggle that flag off whenever multiline is on, it can be stale so the reset is skipped.

On top of that, under the new architecture the view is not re-measured when only the input type changes while the measured size is unchanged. The placeholder is then rebuilt at draw time at the view's physical width and stays wrapped.

This change restores single-line mode when multiline is turned off (skipping secure-text fields so their password transformation method is preserved) and forces a re-measure on the multiline-to-single-line transition, so the placeholder is laid out on a single line again.

Changelog:
[Android][Fixed] - Fix TextInput placeholder staying on multiple lines after multiline is toggled from true back to false

Reviewed By: javache

Differential Revision: D108370869

[meta-codesync]

@Abbondanzo has exported this pull request. If you are a Meta employee, you can view the originating Diff in D108370869.

[meta-codesync]

This pull request has been merged in df6de4f.