Update open source build to target sdk version 28, and remove annotations

Updated the open source build for Android to target sdk version 28, for the new androidx dependencies, and remove annotations, since those changed based on the android support library vs androidx, which complicated the build unnecessarily.

PiperOrigin-RevId: 255515435

Author: a-maurice

admob/admob_resources/build.gradle

@@ -32,7 +32,7 @@ allprojects {
 apply plugin: 'com.android.library'
 
 android {
-  compileSdkVersion 26
+  compileSdkVersion 28
 
   sourceSets {
     main {

admob/build.gradle

@@ -31,7 +31,7 @@ allprojects {
 apply plugin: 'com.android.library'
 
 android {
-  compileSdkVersion 26
+  compileSdkVersion 28
   buildToolsVersion '28.0.3'
 
   sourceSets {
@@ -49,7 +49,7 @@ android {
   defaultConfig {
     // This is the platform API where NativeActivity was introduced.
     minSdkVersion 9
-    targetSdkVersion 26
+    targetSdkVersion 28
     versionCode 1
     versionName "1.0"
 

analytics/build.gradle

@@ -31,7 +31,7 @@ allprojects {
 apply plugin: 'com.android.library'
 
 android {
-  compileSdkVersion 26
+  compileSdkVersion 28
   buildToolsVersion '28.0.3'
 
   sourceSets {
@@ -49,7 +49,7 @@ android {
   defaultConfig {
     // This is the platform API where NativeActivity was introduced.
     minSdkVersion 9
-    targetSdkVersion 26
+    targetSdkVersion 28
     versionCode 1
     versionName "1.0"
 

app/app_resources/build.gradle

@@ -32,7 +32,7 @@ allprojects {
 apply plugin: 'com.android.library'
 
 android {
-  compileSdkVersion 26
+  compileSdkVersion 28
 
   sourceSets {
     main {

app/build.gradle

@@ -31,7 +31,7 @@ allprojects {
 apply plugin: 'com.android.library'
 
 android {
-  compileSdkVersion 26
+  compileSdkVersion 28
   buildToolsVersion '28.0.3'
 
   sourceSets {
@@ -49,7 +49,7 @@ android {
   defaultConfig {
     // This is the platform API where NativeActivity was introduced.
     minSdkVersion 9
-    targetSdkVersion 26
+    targetSdkVersion 28
     versionCode 1
     versionName "1.0"
 

app/google_api_resources/build.gradle

@@ -32,7 +32,7 @@ allprojects {
 apply plugin: 'com.android.library'
 
 android {
-  compileSdkVersion 26
+  compileSdkVersion 28
 
   sourceSets {
     main {

app/invites_resources/build.gradle

@@ -32,7 +32,7 @@ allprojects {
 apply plugin: 'com.android.library'
 
 android {
-  compileSdkVersion 26
+  compileSdkVersion 28
 
   sourceSets {
     main {

app/src_java/com/google/firebase/invites/internal/cpp/AppInviteNativeWrapper.java

@@ -24,8 +24,6 @@
 import android.content.Intent;
 import android.net.Uri;
 import android.os.Bundle;
-import android.support.annotation.NonNull;
-import android.support.annotation.Nullable;
 import com.google.android.gms.appinvite.AppInvite;
 import com.google.android.gms.appinvite.AppInviteInvitation;
 import com.google.android.gms.appinvite.AppInviteInvitationResult;
@@ -180,7 +178,7 @@ public void discardNativePointer() {
   }
 
   @Override
-  public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
+  public void onConnectionFailed(ConnectionResult connectionResult) {
     /* do something with the error...? */
     safeConnectionFailedCallback(
         nativeInternalPtr, connectionResult.getErrorCode(), connectionResult.getErrorMessage());
@@ -439,7 +437,7 @@ public void gotInvitationResult(String[] invitationIDs, int resultCode, String e
   boolean waitingToFetchInvites = false;
 
   @Override
-  public void onConnected(@Nullable Bundle bundle) {
+  public void onConnected(Bundle bundle) {
     activity.runOnUiThread(
         new Runnable() {
           @Override
@@ -475,7 +473,7 @@ void finishPendingFetchInvite() {
             .setResultCallback(
                 new ResultCallback<AppInviteInvitationResult>() {
                   @Override
-                  public void onResult(@NonNull AppInviteInvitationResult result) {
+                  public void onResult(AppInviteInvitationResult result) {
                     Log.d(TAG, "getInvitation:onResult:" + result.getStatus());
                     Intent invitation = result.getInvitationIntent();
                     if (invitation != null && AppInviteReferral.hasReferral(invitation)) {
@@ -558,7 +556,7 @@ public void run() {
                     .setResultCallback(
                         new ResultCallback<Status>() {
                           @Override
-                          public void onResult(@NonNull Status status) {
+                          public void onResult(Status status) {
                             Log.d(TAG, "convertInvitation:onResult:" + status);
                             if (status.isSuccess()) {
                               safeConvertedInviteCallback(

auth/auth_resources/build.gradle

@@ -32,7 +32,7 @@ allprojects {
 apply plugin: 'com.android.library'
 
 android {
-  compileSdkVersion 26
+  compileSdkVersion 28
 
   sourceSets {
     main {

auth/build.gradle

@@ -31,7 +31,7 @@ allprojects {
 apply plugin: 'com.android.library'
 
 android {
-  compileSdkVersion 26
+  compileSdkVersion 28
   buildToolsVersion '28.0.3'
 
   sourceSets {
@@ -49,7 +49,7 @@ android {
   defaultConfig {
     // This is the platform API where NativeActivity was introduced.
     minSdkVersion 9
-    targetSdkVersion 26
+    targetSdkVersion 28
     versionCode 1
     versionName "1.0"