Make KoinModule and MyKoinContext as internal

src/main/java/com/kdanmobile/reader/koin/KoinModule.kt

@@ -12,7 +12,7 @@ import com.kdanmobile.reader.thumb.PdfThumbViewModel
 import org.koin.android.viewmodel.dsl.viewModel
 import org.koin.dsl.module
 
-object KoinModule {
+internal object KoinModule {
     val m = module {
         single { ReaderModelManager() }
         viewModel { (applicationContext: Context, info: CopyFileInfo) ->

src/main/java/com/kdanmobile/reader/koin/MyKoinContext.kt

@@ -2,6 +2,6 @@ package com.kdanmobile.reader.koin
 
 import org.koin.core.KoinApplication
 
-object MyKoinContext {
+internal object MyKoinContext {
     lateinit var koinApplication: KoinApplication
 }