Bump chunk size for android (facebook#54301)

Summary:
Pull Request resolved: facebook#54301

# Changelog: [Internal]

Previously, we would read every single kilobyte and do Java -> C++ call with `jni`.

For big objects, like source maps, this means that we were doing at least 1024 calls for a single megabyte of incoming data. From my observations, some source maps on Twilight could reach 30Mb+.

There is a trade-off between how much of memory we want to allocate while reading a stream and a runtime. I didn't notice any differences while changing the chunk size from 8Kb to 1Mb and some values in between; in the end it purely depends on the OkHttp's or Okio's implementation of the stream, looks like it uses 8Kb as a chunk size by default:
{F1983042734}

Reviewed By: huntie

Differential Revision: D85652217

fbshipit-source-id: 68474f0b7eece13a0a1c8ea9e617b99a26d81ff9

Author: hoxyq

packages/react-native/ReactAndroid/src/main/java/com/facebook/react/devsupport/inspector/InspectorNetworkHelper.kt

@@ -66,7 +66,7 @@ internal object InspectorNetworkHelper {
               response.body().use { responseBody ->
                 if (responseBody != null) {
                   val inputStream = responseBody.byteStream()
-                  val chunkSize = 1024
+                  val chunkSize = 8 * 1024 // 8Kb
                   val buffer = ByteArray(chunkSize)
                   var bytesRead: Int