fix(java): validate decoder push length in Wrapper only

Per review feedback, keep the input length upper-bound check in
DecoderJNI.Wrapper.push() and remove the redundant native guard.

java/org/brotli/wrapper/dec/decoder_jni.cc

diff --git a/java/org/brotli/wrapper/dec/decoder_jni.cc b/java/org/brotli/wrapper/dec/decoder_jni.cc
index 1004bab..a92d34c 100644
--- a/java/org/brotli/wrapper/dec/decoder_jni.cc
+++ b/java/org/brotli/wrapper/dec/decoder_jni.cc
@@ -24,7 +24,6 @@
   size_t dictionary_count;
 
   uint8_t* input_start;
-  size_t input_size;
   size_t input_offset;
   size_t input_length;
 } DecoderHandle;
@@ -68,7 +67,6 @@
     handle->dictionary_count = 0;
     handle->input_offset = 0;
     handle->input_length = 0;
-    handle->input_size = 0;
     handle->input_start = nullptr;
 
     if (input_size == 0) {
@@ -76,9 +74,6 @@
     } else {
       handle->input_start = new (std::nothrow) uint8_t[input_size];
       ok = !!handle->input_start;
-      if (ok) {
-        handle->input_size = input_size;
-      }
     }
   }
 
@@ -130,11 +125,6 @@
   env->functions->SetLongArrayRegion(env, ctx, 0, 3, context);
 
   if (input_length != 0) {
-    /* Reject input length that exceeds the allocated input buffer. */
-    if (input_length < 0 ||
-        static_cast<size_t>(input_length) > handle->input_size) {
-      return;
-    }
     /* Still have unconsumed data. Workflow is broken. */
     if (handle->input_offset < handle->input_length) {
       return;