Require targetSdkVersion>=O for updated graphics driver packages

In O, graphics drivers are loaded into a new restricted linker
namespace. Drivers built for previous versions of the OS may not work
under those restrictions, so require an updated driver package to
declare compatibility by setting targetSdkVersion >= O.

Bug: 34228255
Test: manually construct packages with and without
      targetSdkVersion >= O, confirm driver is used/not-used as
      expected.
Change-Id: I4518360433a6de5c6e1e792a6eedddf8c6bf4394

1 files changed, 7 insertions, 0 deletions

diff --git a/core/java/android/os/GraphicsEnvironment.java b/core/java/android/os/GraphicsEnvironment.java
index e4cdbce09796..f9eaba921cc1 100644
--- a/core/java/android/os/GraphicsEnvironment.java
+++ b/core/java/android/os/GraphicsEnvironment.java
@@ -20,6 +20,7 @@ import android.content.Context;
 import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageManager;
 import android.opengl.EGL14;
+import android.os.Build;
 import android.os.SystemProperties;
 import android.util.Log;
 
@@ -81,6 +82,12 @@ public final class GraphicsEnvironment {
             }
             return;
         }
+        if (driverInfo.targetSdkVersion < Build.VERSION_CODES.O) {
+            // O drivers are restricted to the sphal linker namespace, so don't try to use
+            // packages unless they declare they're compatible with that restriction.
+            Log.w(TAG, "updated driver package is not known to be compatible with O");
+            return;
+        }
 
         StringBuilder sb = new StringBuilder();
         sb.append(driverInfo.nativeLibraryDir)