fix: avoid android.os.strictmode.UnbufferedIoViolation (resubmission of PR #6565) (#6822)

- Wrap InputStream with BufferedInputStream to ensure buffered I/O and
prevent UnbufferedIoViolation in Android 14 (SDK 34).
- Use try-with-resources to automatically close streams, improving
resource management.
- Retain existing functionality for converting InputStream to a UTF-8
string.

This change ensures compliance with Android 14's stricter I/O policies.

Co-authored-by: Matthew Robertson <[email protected]>
Co-authored-by: David Motsonashvili <[email protected]>

Author: 3 people

firebase-crashlytics/src/main/java/com/google/firebase/crashlytics/internal/common/SessionReportingCoordinator.java

@@ -36,6 +36,7 @@
 import com.google.firebase.crashlytics.internal.send.DataTransportCrashlyticsReportSender;
 import com.google.firebase.crashlytics.internal.settings.SettingsProvider;
 import com.google.firebase.crashlytics.internal.stacktrace.StackTraceTrimmingStrategy;
+import java.io.BufferedInputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.File;
 import java.io.IOException;
@@ -427,13 +428,15 @@ private static CrashlyticsReport.ApplicationExitInfo convertApplicationExitInfo(
   @VisibleForTesting
   @RequiresApi(api = Build.VERSION_CODES.KITKAT)
   public static String convertInputStreamToString(InputStream inputStream) throws IOException {
-    ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
-    byte[] bytes = new byte[DEFAULT_BUFFER_SIZE];
-    int length;
-    while ((length = inputStream.read(bytes)) != -1) {
-      byteArrayOutputStream.write(bytes, 0, length);
+    try (BufferedInputStream bufferedInputStream = new BufferedInputStream(inputStream);
+        ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream()) {
+      byte[] bytes = new byte[DEFAULT_BUFFER_SIZE];
+      int length;
+      while ((length = bufferedInputStream.read(bytes)) != -1) {
+        byteArrayOutputStream.write(bytes, 0, length);
+      }
+      return byteArrayOutputStream.toString(StandardCharsets.UTF_8.name());
     }
-    return byteArrayOutputStream.toString(StandardCharsets.UTF_8.name());
   }
 
   /** Finds the first ANR ApplicationExitInfo within the session. */