Update targetSdkVersion to 28

Bug: 79153175
Test: Compiled and verified that merged manifest had targetSdkVersion=28
PiperOrigin-RevId: 195145440
Change-Id: I12cde947d8fe8594f91bcc3dacdba6f9c72ac84a
diff --git a/java/com/android/incallui/AndroidManifest.xml b/java/com/android/incallui/AndroidManifest.xml
index 7286b0d..f20b21d 100644
--- a/java/com/android/incallui/AndroidManifest.xml
+++ b/java/com/android/incallui/AndroidManifest.xml
@@ -19,7 +19,7 @@
 
   <uses-sdk
       android:minSdkVersion="24"
-      android:targetSdkVersion="27"/>
+      android:targetSdkVersion="28"/>
 
   <uses-permission android:name="android.permission.CONTROL_INCALL_EXPERIENCE"/>
   <!-- We use this to disable the status bar buttons of home, back and recent