PackageManagerService: Add more ABI adjustment logging

To help with diagnosis of preopt-related ABI-mismatched induced
errors, log more information during ABI adjustment.

Change-Id: I035f229b20588d5f1ec5f91707ef687d39c1a267
diff --git a/services/core/java/com/android/server/pm/PackageManagerService.java b/services/core/java/com/android/server/pm/PackageManagerService.java
index c3f20eb..9f3dfc1 100644
--- a/services/core/java/com/android/server/pm/PackageManagerService.java
+++ b/services/core/java/com/android/server/pm/PackageManagerService.java
@@ -8099,9 +8099,15 @@
                     }
 
                     ps.primaryCpuAbiString = adjustedAbi;
-                    if (ps.pkg != null && ps.pkg.applicationInfo != null) {
+                    if (ps.pkg != null && ps.pkg.applicationInfo != null &&
+                            !TextUtils.equals(adjustedAbi, ps.pkg.applicationInfo.primaryCpuAbi)) {
                         ps.pkg.applicationInfo.primaryCpuAbi = adjustedAbi;
-                        Slog.i(TAG, "Adjusting ABI for " + ps.name + " to " + adjustedAbi);
+                        Slog.i(TAG, "Adjusting ABI for " + ps.name + " to " + adjustedAbi
+                                + " (requirer="
+                                + (requirer == null ? "null" : requirer.pkg.packageName)
+                                + ", scannedPackage="
+                                + (scannedPackage != null ? scannedPackage.packageName : "null")
+                                + ")");
                         try {
                             mInstaller.rmdex(ps.codePathString,
                                     getDexCodeInstructionSet(getPreferredInstructionSet()));