fix: Use method compatible with Android 12 and lower

src/main/kotlin/app/revanced/patcher/patch/BytecodePatchContext.kt

@@ -19,8 +19,10 @@ import lanchon.multidexlib2.BasicDexFileNamer
 import lanchon.multidexlib2.DexIO
 import lanchon.multidexlib2.MultiDexIO
 import lanchon.multidexlib2.RawDexIO
+import java.io.ByteArrayOutputStream
 import java.io.Closeable
 import java.io.FileFilter
+import java.io.InputStream
 import java.util.*
 import java.util.logging.Logger
 
@@ -58,6 +60,26 @@ class BytecodePatchContext internal constructor(private val config: PatcherConfi
  */
  internal val lookupMaps by lazy { LookupMaps(classes) }
 
+ /**
+ * Because InputStream.readAllBytes() is not available with Android until 13.0,
+ * roll our own implementation until this project uses Kotlin multiplatform.
+ */
+ private fun InputStream.readAllBytesBackwardsCompatible(): ByteArray {
+ val buffer = ByteArrayOutputStream()
+ val data = ByteArray(1024)
+
+ while (true) {
+ var length = this.read(data)
+ if (length >= 0) {
+ buffer.write(data, 0, length)
+ } else {
+ break
+ }
+ }
+
+ return buffer.toByteArray()
+ }
+
  /**
  * Merge the extensions for this set of patches.
  */
@@ -70,7 +92,7 @@ class BytecodePatchContext internal constructor(private val config: PatcherConfi
  forEachRecursively { patch ->
  if (patch is BytecodePatch && patch.extension != null) {
 
- val extension = patch.extension.readAllBytes()
+ val extension = patch.extension.readAllBytesBackwardsCompatible()
 
  RawDexIO.readRawDexFile(extension, 0, null).classes.forEach { classDef ->
  val existingClass = classesByType[classDef.type] ?: run {