Add androidx.annotation library so we can use @RequiresApi

This is needed in new versions of UniFFi.

Author: jmartinesp

buildSrc/src/main/kotlin/Dependencies.kt

@@ -5,6 +5,7 @@ object DependenciesVersions {
     const val nexusPublishGradlePlugin = "1.3.0"
     const val jna = "5.14.0"
     const val coroutines = "1.7.3"
+    const val annotations = "1.7.1"
 }
 
 /**
@@ -14,4 +15,5 @@ object Dependencies {
     const val coroutines = "org.jetbrains.kotlinx:kotlinx-coroutines-core:${DependenciesVersions.coroutines}"
     const val junit = "junit:junit:${DependenciesVersions.jUnit}"
     const val jna = "net.java.dev.jna:jna:${DependenciesVersions.jna}@aar"
+    const val annotations = "androidx.annotation:annotation:${DependenciesVersions.annotations}"
 }

sdk/sdk-android/build.gradle

@@ -47,5 +47,6 @@ android {
 dependencies {
     implementation Dependencies.jna
     implementation Dependencies.coroutines
+    implementation Dependencies.annotations
     testImplementation Dependencies.junit
 }