Make finding buttons by text search case-insensitively

An OEM had an all-caps "ALLOW" button, probably due to their
theme.

Bug: 161331634
Test: make cts, cts-tradefed, run cts -m CtsPermission3TestCases, run cts -m CtsPermissionTestCases -t android.permission.cts.PermissionGroupChange
Change-Id: I9cadbc51b55c623f0b3d5ef6bd4735a0de87bff4
diff --git a/tests/tests/permission/src/android/permission/cts/PermissionGroupChange.java b/tests/tests/permission/src/android/permission/cts/PermissionGroupChange.java
index 37a448b..ce2fade 100644
--- a/tests/tests/permission/src/android/permission/cts/PermissionGroupChange.java
+++ b/tests/tests/permission/src/android/permission/cts/PermissionGroupChange.java
@@ -47,6 +47,7 @@
 import org.junit.Test;
 
 import java.util.concurrent.TimeUnit;
+import java.util.regex.Pattern;
 
 public class PermissionGroupChange {
     private static final String APP_PKG_NAME = "android.permission.cts.appthatrequestpermission";
@@ -107,7 +108,8 @@
             if (mAllowButtonText == null) {
                 mAllowButtonText = getPermissionControllerString("grant_dialog_button_allow");
             }
-            mUiDevice.findObject(By.text(mAllowButtonText)).click();
+            mUiDevice.findObject(By.text(Pattern.compile(Pattern.quote(mAllowButtonText),
+                    Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE))).click();
         } else {
             mUiDevice.findObject(By.res(
                     "com.android.permissioncontroller:id/permission_allow_button")).click();
diff --git a/tests/tests/permission3/src/android/permission3/cts/BasePermissionTest.kt b/tests/tests/permission3/src/android/permission3/cts/BasePermissionTest.kt
index 5cd5c4f..3af1b50 100644
--- a/tests/tests/permission3/src/android/permission3/cts/BasePermissionTest.kt
+++ b/tests/tests/permission3/src/android/permission3/cts/BasePermissionTest.kt
@@ -38,6 +38,7 @@
 import org.junit.Before
 import org.junit.Rule
 import java.util.concurrent.CompletableFuture
+import java.util.regex.Pattern
 
 abstract class BasePermissionTest {
     companion object {
@@ -90,9 +91,11 @@
         pressHome()
     }
 
-    protected fun getPermissionControllerString(res: String): String =
-            mPermissionControllerResources.getString(mPermissionControllerResources
-                    .getIdentifier(res, "string", "com.android.permissioncontroller"))
+    protected fun getPermissionControllerString(res: String): Pattern =
+            Pattern.compile(Pattern.quote(mPermissionControllerResources.getString(
+                    mPermissionControllerResources.getIdentifier(
+                            res, "string", "com.android.permissioncontroller"))),
+                    Pattern.CASE_INSENSITIVE or Pattern.UNICODE_CASE)
 
     protected fun installPackage(
         apkPath: String,