Upgrade Kotlin to 1.8.20 (#4753)

Summary:
[android] Upgrade Kotlin to 1.8.20
The additional source/target settings should hopefully no longer be necessary with
AGP 8.1:

https://kotlinlang.org/docs/gradle-configure-project.html#gradle-java-toolchains-support

Pull Request resolved: https://github.com/facebook/flipper/pull/4753

Test Plan:
- CI
- Build sample app
- AS sync

 ---
Stack created with [Sapling](https://sapling-scm.com). Best reviewed with [ReviewStack](https://reviewstack.dev/facebook/flipper/pull/4753).
* https://github.com/facebook/flipper/issues/4759
* https://github.com/facebook/flipper/issues/4758
* https://github.com/facebook/flipper/issues/4757
* https://github.com/facebook/flipper/issues/4756
* https://github.com/facebook/flipper/issues/4755
* https://github.com/facebook/flipper/issues/4754
* __->__ https://github.com/facebook/flipper/issues/4753
* https://github.com/facebook/flipper/issues/4752
* https://github.com/facebook/flipper/issues/4751

Reviewed By: ivanmisuno

Differential Revision: D46068906

Pulled By: passy

fbshipit-source-id: 93da60ebfe2ec590ef88ea1936fcfd5257699cc7

android/build.gradle

@@ -48,6 +48,11 @@ android {
         }
     }
 
+    compileOptions {
+        targetCompatibility rootProject.javaTargetVersion
+        sourceCompatibility rootProject.javaTargetVersion
+    }
+
     buildFeatures {
         prefab true
     }

android/plugins/leakcanary2/build.gradle

@@ -19,6 +19,11 @@ android {
         targetSdkVersion rootProject.targetSdkVersion
     }
 
+    compileOptions {
+        targetCompatibility rootProject.javaTargetVersion
+        sourceCompatibility rootProject.javaTargetVersion
+    }
+
     dependencies {
         compileOnly "org.jetbrains.kotlin:kotlin-stdlib:$KOTLIN_VERSION"
         implementation project(':android')

android/plugins/litho/build.gradle

@@ -18,6 +18,11 @@ android {
         targetSdkVersion rootProject.targetSdkVersion
     }
 
+    compileOptions {
+        targetCompatibility rootProject.javaTargetVersion
+        sourceCompatibility rootProject.javaTargetVersion
+    }
+
     dependencies {
         compileOnly deps.lithoAnnotations
         implementation project(':android')

android/plugins/retrofit2-protobuf/build.gradle

@@ -19,6 +19,11 @@ android {
         targetSdkVersion rootProject.targetSdkVersion
     }
 
+    compileOptions {
+        targetCompatibility rootProject.javaTargetVersion
+        sourceCompatibility rootProject.javaTargetVersion
+    }
+
     dependencies {
         implementation "org.jetbrains.kotlin:kotlin-stdlib:$KOTLIN_VERSION"
         implementation project(':android')

android/sample/build.gradle

@@ -12,6 +12,7 @@ android {
     compileSdkVersion rootProject.compileSdkVersion
     buildToolsVersion rootProject.buildToolsVersion
     ndkVersion rootProject.ndkVersion
+
     defaultConfig {
         minSdkVersion 21
         testInstrumentationRunner 'androidx.test.runner.AndroidJUnitRunner'
@@ -36,8 +37,8 @@ android {
     }
 
     compileOptions {
-        targetCompatibility JavaVersion.VERSION_1_8
-        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility rootProject.javaTargetVersion
+        sourceCompatibility rootProject.javaTargetVersion
     }
 
     packagingOptions {

android/tutorial/build.gradle

@@ -22,8 +22,8 @@ android {
     }
 
     compileOptions {
-        targetCompatibility JavaVersion.VERSION_1_8
-        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility rootProject.javaTargetVersion
+        sourceCompatibility rootProject.javaTargetVersion
     }
 
     buildTypes {
@@ -33,10 +33,6 @@ android {
         }
     }
 
-    kotlinOptions {
-        jvmTarget = "1.8"
-    }
-
     packagingOptions {
         pickFirst "**/libcrypto.so"
         pickFirst "**/libevent-2.1.so"

build.gradle

@@ -50,6 +50,7 @@ ext {
     compileSdkVersion = 31
     buildToolsVersion = "30.0.3"
     ndkVersion = "$NDK_VERSION"
+    javaTargetVersion = JavaVersion.VERSION_17
 }
 
 ext.deps = [

gradle.properties

@@ -19,7 +19,7 @@ POM_ISSUES_URL=https://github.com/facebook/flipper/issues/
 # Shared version numbers
 LITHO_VERSION=0.44.0
 ANDROIDX_VERSION=1.3.0
-KOTLIN_VERSION=1.6.20
+KOTLIN_VERSION=1.8.20
 FBJNI_VERSION=0.3.0
 SOLOADER_VERSION=0.10.4
 # NDK