Bump minSdk to 23 in RN OSS (#38874)

Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/38874

In this diff I'm increasing the minSdk of RN Android to 23 to keep it in sync with Meta min sdk

changelog: [Android][Breaking] Increase min sdk version of RN Android to 23

Reviewed By: fkgozali, NickGerleman

Differential Revision: D48177965

fbshipit-source-id: 79f46f6e1674fe9d38dc9dfbe8f0f9a43f39a712

packages/react-native/ReactAndroid/src/main/AndroidManifest.xml

@@ -8,7 +8,7 @@
    up from the file to lint until it find an AndroidManifest with a minSdkVersion. This is then used
    as the min SDK to lint the file.-->
   <uses-sdk
-      android:minSdkVersion="21"
+      android:minSdkVersion="23"
       android:targetSdkVersion="34"
       />
 

packages/react-native/gradle/libs.versions.toml

@@ -1,6 +1,6 @@
 [versions]
 # Android versions
-minSdk = "21"
+minSdk = "23"
 targetSdk = "34"
 compileSdk = "34"
 buildTools = "34.0.0"

packages/react-native/template/android/build.gradle

@@ -3,7 +3,7 @@
 buildscript {
     ext {
         buildToolsVersion = "34.0.0"
-        minSdkVersion = 21
+        minSdkVersion = 23
         compileSdkVersion = 34
         targetSdkVersion = 34
         ndkVersion = "25.1.8937393"