Fix Android inline Text views with small font scale

Summary:
Fixes #50916.
Closes torin-asakura/workspace#126.

Android inline views inside `<Text>` receive their measured layout size from Fabric as layout units/DIP. TextLayoutManager was converting those attachment dimensions with `PixelUtil.toPixelFromSP(...)`, so a device font scale below 1.0 shrank the inline view placeholder width. In the #50916 RNTester reproducer, a measured `Row cutoff` attachment around 155px became about 132px at `font_scale=0.85`, clipping the rendered text to `Row`.

This changes inline text attachment dimensions to use DIP conversion and rounds them up to the pixel grid in both spannable construction paths.

## Changelog:

[ANDROID] [FIXED] - Keep inline views inside Text from shrinking with Android system font scale

X-link: #57132

Reviewed By: christophpurrer

Differential Revision: D108030457

Pulled By: cipolleschi

fbshipit-source-id: af68489aed0ee9c39f3a440f07ca9286ff5ed30c

Author: TorinAsakura

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/text/TextLayoutManager.kt

@@ -266,13 +266,15 @@ internal object TextLayoutManager {
       val reactTag =
           if (fragment.contains(FR_KEY_REACT_TAG)) fragment.getInt(FR_KEY_REACT_TAG) else View.NO_ID
       if (fragment.contains(FR_KEY_IS_ATTACHMENT) && fragment.getBoolean(FR_KEY_IS_ATTACHMENT)) {
-        val width = PixelUtil.toPixelFromSP(fragment.getDouble(FR_KEY_WIDTH))
-        val height = PixelUtil.toPixelFromSP(fragment.getDouble(FR_KEY_HEIGHT))
         ops.add(
             SetSpanOperation(
                 sb.length - 1,
                 sb.length,
-                TextInlineViewPlaceholderSpan(reactTag, width.toInt(), height.toInt()),
+                TextInlineViewPlaceholderSpan(
+                    reactTag,
+                    inlineViewSizeToPixels(fragment.getDouble(FR_KEY_WIDTH)),
+                    inlineViewSizeToPixels(fragment.getDouble(FR_KEY_HEIGHT)),
+                ),
             ),
         )
       } else if (end >= start) {
@@ -490,8 +492,8 @@ internal object TextLayoutManager {
         spannable.setSpan(
             TextInlineViewPlaceholderSpan(
                 fragment.reactTag,
-                PixelUtil.toPixelFromSP(fragment.width).toInt(),
-                PixelUtil.toPixelFromSP(fragment.height).toInt(),
+                inlineViewSizeToPixels(fragment.width),
+                inlineViewSizeToPixels(fragment.height),
             ),
             start,
             end,
@@ -658,6 +660,10 @@ internal object TextLayoutManager {
     return spannable
   }
 
+  @VisibleForTesting
+  internal fun inlineViewSizeToPixels(size: Double): Int =
+      ceil(PixelUtil.toPixelFromDIP(size).toDouble()).toInt()
+
   @OptIn(UnstableReactNativeAPI::class)
   fun getOrCreateSpannableForText(
       assets: AssetManager,

packages/react-native/ReactAndroid/src/test/java/com/facebook/react/views/text/TextLayoutManagerInlineViewSizeTest.kt

@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+@file:Suppress("DEPRECATION")
+
+package com.facebook.react.views.text
+
+import android.util.DisplayMetrics
+import com.facebook.react.uimanager.DisplayMetricsHolder
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.After
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+
+@RunWith(RobolectricTestRunner::class)
+class TextLayoutManagerInlineViewSizeTest {
+
+  @After
+  fun tearDown() {
+    DisplayMetricsHolder.setScreenDisplayMetrics(null)
+  }
+
+  @Test
+  fun `inline view attachment width does not shrink with small font scale`() {
+    DisplayMetricsHolder.setScreenDisplayMetrics(
+        DisplayMetrics().apply {
+          density = 1f
+          scaledDensity = 0.85f
+        },
+    )
+
+    assertThat(TextLayoutManager.inlineViewSizeToPixels(155.0)).isEqualTo(155)
+  }
+
+  @Test
+  fun `inline view attachment width is rounded up to the pixel grid`() {
+    DisplayMetricsHolder.setScreenDisplayMetrics(
+        DisplayMetrics().apply {
+          density = 1f
+          scaledDensity = 1f
+        },
+    )
+
+    assertThat(TextLayoutManager.inlineViewSizeToPixels(132.1)).isEqualTo(133)
+  }
+}