Fix NPE in ReactProgressBarViewManager.measure() with nullable params

Summary:
Match `ViewManager.measure()`'s Java signature (which has always accepted nullable `localData`/`props`/`state`) and the sibling `ReactSwitchManager.kt` pattern. The Kotlin migration in D49551193 (2024-07) wrongly tightened the override on `ReactProgressBarViewManager` to non-null `ReadableMap`, which threw NPE on entry whenever the C++ side passed `nullptr` for `localData` or `state` — which `AndroidProgressBarMeasurementsManager::measure` has always done.

The latent bug was masked by Yoga's measure cache plus the now-removed `AndroidProgressBarMeasurementsManager` measurement cache (removed in D60192289, 2025-06). D105720159's CSS Flexbox §4.5 auto-min-size probe reliably bypasses Yoga's cache by calling `node->measure(... AtMost 0 ...)` per flex item, exposing the NPE and crashing Airwave on Android (T273821098, P2359486686).

Fix: change `localData`/`props`/`state` to nullable `ReadableMap?` and use safe call on `props?.getString(...)`. This unblocks D105720159 from being re-landed.

Differential Revision: D107178838

Author: adityasharat

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/views/progressbar/ReactProgressBarViewManager.kt

@@ -100,16 +100,16 @@ internal class ReactProgressBarViewManager :
 
   override fun measure(
       context: Context,
-      localData: ReadableMap,
-      props: ReadableMap,
-      state: ReadableMap,
+      localData: ReadableMap?,
+      props: ReadableMap?,
+      state: ReadableMap?,
       width: Float,
       widthMode: YogaMeasureMode,
       height: Float,
       heightMode: YogaMeasureMode,
       attachmentsPositions: FloatArray?,
   ): Long {
-    val style = getStyleFromString(props.getString(PROP_STYLE))
+    val style = getStyleFromString(props?.getString(PROP_STYLE))
     val value =
         measuredStyles.getOrPut(style) {
           val progressBar = createProgressBar(context, style)