plugin: bump min sdk to 21 + update test dependencies + proguard rules

Author: arnaud-roland

hms-plugin/build.gradle

@@ -9,7 +9,7 @@ ext {
 android {
     namespace = "com.batch.android.plugin.hms"
     defaultConfig {
-        minSdkVersion 17
+        minSdkVersion 21
         compileSdk 34
         targetSdkVersion 34
         versionCode 1
@@ -44,15 +44,13 @@ dependencies {
     implementation "androidx.annotation:annotation:$androidXLibraryVersion"
 
     // Optional
-    compileOnly 'com.huawei.hms:ads-identifier:3.4.30.307'
-
     compileOnly "com.google.firebase:firebase-messaging:22.0.0"
 
-    testImplementation 'junit:junit:4.13'
-    testImplementation 'androidx.test.ext:junit:1.1.1'
-    testImplementation 'org.mockito:mockito-core:3.2.4'
-    testImplementation 'org.robolectric:robolectric:4.4'
-    testImplementation 'androidx.test.espresso:espresso-core:3.2.0'
+    testImplementation 'junit:junit:4.13.2'
+    testImplementation 'androidx.test.ext:junit:1.2.1'
+    testImplementation 'org.mockito:mockito-core:5.4.0'
+    testImplementation 'org.robolectric:robolectric:4.11.1'
+    testImplementation 'androidx.test.espresso:espresso-core:3.6.1'
 }
 
 apply from: 'maven-publish.gradle'

hms-plugin/consumer-rules.pro

@@ -9,4 +9,5 @@
 -keep class com.huawei.updatesdk.**{*;}
 -keep class com.huawei.hms.**{*;}
 -keep class com.huawei.hms.ads.** { *; }
+-keep class com.huawei.hms.api.** { *; }
 -keep interface com.huawei.hms.ads.** { *; }