Depend on core as api dependency

onionwrapper-android/build.gradle

@@ -28,8 +28,8 @@ android {
 }
 
 dependencies {
-    implementation project(':onionwrapper-core')
-    implementation 'org.briarproject:dont-kill-me-lib:0.2.6'
+    api project(':onionwrapper-core')
+    api 'org.briarproject:dont-kill-me-lib:0.2.6'
 }
 
 mavenPublishing {

onionwrapper-java/build.gradle

@@ -9,7 +9,7 @@ java {
 }
 
 dependencies {
-    implementation project(':onionwrapper-core')
+    api project(':onionwrapper-core')
     def jna_version = '4.5.2'
     implementation "net.java.dev.jna:jna:$jna_version"
     implementation "net.java.dev.jna:jna-platform:$jna_version"