Suppress InvalidPatternSyntax issue instead of demoting

So that it will still be an error for other parts of the code.

Bug: 311064136
Test: m RUN_ERROR_PRONE=true SystemUI-core SystemUI-tests SystemUIRobo-stub
Change-Id: I48d85c79f19cb90cc8df7a9890ab9f4719d73d7f
Merged-In: Ic408374fc30f849eedbb60c6f470e432c46d0576
diff --git a/packages/SystemUI/Android.bp b/packages/SystemUI/Android.bp
index fae2991..8ca925b 100644
--- a/packages/SystemUI/Android.bp
+++ b/packages/SystemUI/Android.bp
@@ -209,11 +209,6 @@
     lint: {
         extra_check_modules: ["SystemUILintChecker"],
     },
-    errorprone: {
-        javacflags: [
-            "-Xep:InvalidPatternSyntax:WARN",
-        ],
-    },
 }
 
 filegroup {
@@ -410,11 +405,6 @@
         test: true,
         extra_check_modules: ["SystemUILintChecker"],
     },
-    errorprone: {
-        javacflags: [
-            "-Xep:InvalidPatternSyntax:WARN",
-        ],
-    },
 }
 
 android_app {
@@ -452,12 +442,6 @@
     },
 
     plugins: ["dagger2-compiler"],
-
-    errorprone: {
-        javacflags: [
-            "-Xep:InvalidPatternSyntax:WARN",
-        ],
-    },
 }
 
 android_robolectric_test {
diff --git a/packages/SystemUI/src/com/android/systemui/people/PeopleTileViewHelper.java b/packages/SystemUI/src/com/android/systemui/people/PeopleTileViewHelper.java
index 67e9664..27e6895 100644
--- a/packages/SystemUI/src/com/android/systemui/people/PeopleTileViewHelper.java
+++ b/packages/SystemUI/src/com/android/systemui/people/PeopleTileViewHelper.java
@@ -165,6 +165,9 @@
                     + "\\p{Emoji}(\\p{EMod}|\\x{FE0F}\\x{20E3}?|[\\x{E0020}-\\x{E007E}]+\\x{E007F})"
                     + "?)*";
 
+    // Not all JDKs support emoji patterns, including the one errorprone runs under, which
+    // makes it think that this is an invalid pattern.
+    @SuppressWarnings("InvalidPatternSyntax")
     private static final Pattern EMOJI_PATTERN = Pattern.compile(UNICODE_EMOJI_REGEX);
 
     public static final String EMPTY_STRING = "";