Revert "Build: apply Android plugin using version catalog alias"

This reverts commit 400a48f.

Gradle 8.7 still requires a version for plugins in version catalog.

api/build.gradle.kts

@@ -1,5 +1,5 @@
 plugins {
-    alias(libs.plugins.android.library)
+    id("com.android.library")
     id("maven-publish")
     id("signing")
 }

app/build.gradle.kts

@@ -2,7 +2,7 @@ import java.io.FileInputStream
 import java.util.Properties
 
 plugins {
-    alias(libs.plugins.android)
+    id("com.android.application")
     kotlin("android")
     kotlin("kapt")
     alias(libs.plugins.ksp)

backend/build.gradle.kts

@@ -1,6 +1,6 @@
 plugins {
-    alias(libs.plugins.android.library)
-    kotlin("android")
+    id("com.android.library")
+    id("org.jetbrains.kotlin.android")
 //    id("com.google.cloud.tools.endpoints-framework-client")
 }
 

billing/build.gradle.kts

@@ -1,5 +1,5 @@
 plugins {
-    alias(libs.plugins.android.library)
+    id("com.android.library")
     kotlin("android")
     alias(libs.plugins.ksp)
 }

gradle/libs.versions.toml

@@ -127,8 +127,6 @@ androidx-lifecycle-compose = { module = "androidx.lifecycle:lifecycle-viewmodel-
 # https://developer.android.com/build/releases/gradle-plugin
 # 8.7.0+ has false positive lint error for SCHEDULE_EXACT_ALARM permission https://issuetracker.google.com/issues/375352607
 android = { id = "com.android.application", version = "8.6.1" }
-# The library plugin is included with the application plugin, just add this to apply using an alias
-android-library = { id = "com.android.library" }
 # https://kotlinlang.org/docs/releases.html#release-details
 # When updating, must also update compose plugin.
 # Also look for compatible Gradle and Android Plugin versions:

widgets/build.gradle.kts

@@ -1,5 +1,5 @@
 plugins {
-    alias(libs.plugins.android.library)
+    id("com.android.library")
     kotlin("android")
 }