fix: prevent autofill crash before text field layout

[Garzas]

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What's new in this PR?

Issues

The application could crash while navigating to an authentication screen containing an autofill-enabled text field.

The observed exception was:

IllegalStateException: requestAutofill called before onChildPositioned()

Causes

The legacy Compose autofill implementation manually created and registered AutofillNode instances. Autofill could be requested when a field received focus before its position had been calculated.

Several authentication screens also manually cleared the global autofill tree during composition, making the autofill lifecycle more fragile.

Solutions

• Replaced legacy AutofillNode management with Compose ContentType modifiers.
• Applied autofill metadata directly to BasicTextField and BasicSecureTextField.
• Removed manual autofill requests, bounds tracking and autofill tree clearing.
• Added instrumentation tests covering login and password content types.

[github-actions]

Test Results

2 265 tests   2 265 ✅  2m 58s ⏱️
  250 suites      0 💤
  250 files        0 ❌

Results for commit 4e83b53.