[TextField] Allow 1px tolerance in large label focus animation test

`testTextField_heightDoesNotChange_duringFocusAnimation_withLargeLabelText`
verifies that the TextField height remains constant across all ticks of
the focus animation when configured with a large label font.

During the animation, font metrics and line heights are dynamically
interpolated between `displayLarge` and `bodySmall`. On low-density
devices (density < 2.0, such as 1.75), sub-pixel layout calculations can
round the overall height by 1 physical pixel (e.g. from 174px down to
173px).

Because `assertIsEqualTo` defaults to a `0.5.dp` tolerance, and on a
1.75 density screen 1px equals ~0.5714dp (> 0.5dp), the 1-pixel rounding
variation exceeds the default threshold and causes the assertion to
fail.

This change updates the test to accommodate the 1-pixel rounding
differences across all display densities.

Fix: 552669441
Test: PROJECT_PREFIX=:compose:material3: ./gradlew :compose:material3:material3:connectedAndroidDeviceTest -Pandroid.testInstrumentationRunnerArguments.class=androidx.compose.material3.TextFieldTest#testTextField_heightDoesNotChange_duringFocusAnimation_withLargeLabelText
Change-Id: Id425d72fe288ff5b2aa9f305d1318718b7b9c246