Suppress DexPathList#toString() strict mode violations on Android P

This CL adds a strict mode violation exemption for DexPathList#toString() for
Android P in addition to the existing suppression for Android O. The fix
to not call File#isDirectory() in DexPathList#toString() landed in Android Q.

BUG=1109678
TBR=agrieve

Change-Id: I5d028a4584c2e2de7acfe2cdd2631260d3f61cab
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2417494
Commit-Queue: Peter Kotwicz <pkotwicz@chromium.org>
Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#808884}

components/strictmode/android/java/src/org/chromium/components/strictmode/KnownViolations.java

@@ -105,8 +105,8 @@ public final class KnownViolations {
                     DETECT_DISK_WRITE, "android.content.ClipboardManager#setPrimaryClip");
         }
 
-        if (Build.VERSION.SDK_INT == Build.VERSION_CODES.O
-                || Build.VERSION.SDK_INT == Build.VERSION_CODES.O_MR1) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O
+                && Build.VERSION.SDK_INT <= Build.VERSION_CODES.P) {
             exemptions.ignoreExternalMethod(DETECT_DISK_READ, "dalvik.system.DexPathList#toString");
         }
     }