Use built-in proguard rules and @Keep annotation

`-keepattributes LineNumberTable,SourceFile` is not needed since R8 v8.2
APK size is increased by 1.7% though

app/build.gradle.kts

@@ -173,7 +173,7 @@ android {
         release {
             isMinifyEnabled = true
             isShrinkResources = true
-            proguardFiles("proguard-rules.pro")
+            proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro")
             signingConfig = signConfig
             buildConfigField("String", "BUILD_TIME", "\"$buildTime\"")
         }

app/proguard-rules.pro

@@ -1,34 +1,2 @@
--keepclassmembers class * implements android.os.Parcelable {
-    public static final ** CREATOR;
-}
-
--keepclasseswithmembernames,includedescriptorclasses class * {
-    native <methods>;
-}
-
-# https://issuetracker.google.com/issues/190382641
--keepclassmembers class kotlin.SafePublicationLazyImpl {
-    java.lang.Object _value;
-}
-
--keepclassmembers enum androidx.compose.material3.DrawerValue {
-    values();
-}
-
--keep class androidx.viewpager.widget.ViewPager$LayoutParams { int position; }
-
--keep class com.hippo.ehviewer.client.parser.Torrent { *; }
--keep class com.hippo.ehviewer.client.parser.GalleryListResult { *; }
--keep class com.hippo.ehviewer.client.parser.Limits { *; }
--keep class com.hippo.ehviewer.client.data.BaseGalleryInfo { *; }
--keep class com.hippo.ehviewer.ui.scene.SearchBarScene { getBinding(); }
-
-# Ktor logger
--dontwarn org.slf4j.impl.StaticLoggerBinder
-
--keepattributes LineNumberTable,SourceFile
--renamesourcefileattribute SourceFile
-
 -repackageclasses
--allowaccessmodification
 -overloadaggressively

app/src/main/kotlin/com/hippo/ehviewer/client/data/BaseGalleryInfo.kt

@@ -16,6 +16,7 @@
 package com.hippo.ehviewer.client.data
 
 import android.os.Parcelable
+import androidx.annotation.Keep
 import androidx.room.ColumnInfo
 import androidx.room.Entity
 import androidx.room.Ignore
@@ -23,6 +24,7 @@ import androidx.room.PrimaryKey
 import com.hippo.ehviewer.client.data.GalleryInfo.Companion.NOT_FAVORITED
 import kotlinx.parcelize.Parcelize
 
+@Keep
 @Parcelize
 @Entity(tableName = "GALLERIES")
 data class BaseGalleryInfo(

app/src/main/kotlin/com/hippo/ehviewer/client/parser/GalleryListParser.kt

@@ -1,5 +1,6 @@
 package com.hippo.ehviewer.client.parser
 
+import androidx.annotation.Keep
 import com.hippo.ehviewer.EhDB
 import com.hippo.ehviewer.R
 import com.hippo.ehviewer.client.data.BaseGalleryInfo
@@ -31,6 +32,7 @@ object GalleryListParser {
     val emptyResult = GalleryListResult(null, null, arrayListOf())
 }
 
+@Keep
 class GalleryListResult(
     val prev: String?,
     val next: String?,

app/src/main/kotlin/com/hippo/ehviewer/client/parser/HomeParser.kt

@@ -1,6 +1,7 @@
 package com.hippo.ehviewer.client.parser
 
 import android.os.Parcelable
+import androidx.annotation.Keep
 import com.hippo.ehviewer.client.exception.InsufficientFundsException
 import com.hippo.ehviewer.client.exception.ParseException
 import java.nio.ByteBuffer
@@ -34,6 +35,7 @@ object HomeParser {
     class Result(val limits: Limits, val funds: Funds)
 }
 
+@Keep
 @Parcelize
 data class Limits(val current: Int, val maximum: Int, val resetCost: Int) : Parcelable
 

app/src/main/kotlin/com/hippo/ehviewer/client/parser/TorrentParser.kt

@@ -1,5 +1,6 @@
 package com.hippo.ehviewer.client.parser
 
+import androidx.annotation.Keep
 import com.hippo.ehviewer.client.exception.ParseException
 import java.nio.ByteBuffer
 
@@ -9,6 +10,7 @@ object TorrentParser {
     }.getOrElse { throw ParseException("Can't parse torrent list", it) }
 }
 
+@Keep
 class Torrent(
     val posted: String,
     val size: String,

app/src/main/kotlin/com/hippo/ehviewer/ui/scene/SearchBarScene.kt

@@ -8,6 +8,7 @@ import android.view.View
 import android.view.ViewGroup
 import androidx.activity.OnBackPressedCallback
 import androidx.annotation.CallSuper
+import androidx.annotation.Keep
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.consumeWindowInsets
 import androidx.compose.foundation.layout.imePadding
@@ -56,6 +57,8 @@ import kotlinx.coroutines.flow.toList
 
 abstract class SearchBarScene : BaseScene(), ToolBarScene {
     private var _binding: SceneSearchbarBinding? = null
+
+    @get:Keep
     private val binding get() = _binding!!
     private var mSuggestionList by mutableStateOf(emptyList<Suggestion>())
     private var mSuggestionProvider: SuggestionProvider? = null