Multisrc bugfix and genkan refactor (#5707)

* themesource bugfix, refactor genkan

* revert 3da46570aa

core/build.gradle.kts

@@ -1,6 +1,5 @@
 plugins {
     id("com.android.library")
-    kotlin("android")
 }
 
 android {
@@ -13,7 +12,6 @@ android {
     sourceSets {
         named("main") {
             manifest.srcFile("AndroidManifest.xml")
-            java.setSrcDirs(listOf("src"))
             res.setSrcDirs(listOf("res"))
         }
     }
@@ -23,17 +21,4 @@ android {
             enabled = false
         }
     }
-
-    compileOptions {
-        sourceCompatibility = JavaVersion.VERSION_1_8
-        targetCompatibility = JavaVersion.VERSION_1_8
-    }
-
-    kotlinOptions {
-        jvmTarget = JavaVersion.VERSION_1_8.toString()
-    }
-}
-
-dependencies {
-    compileOnly(Deps.kotlin.stdlib)
 }