Remove EGL context limit for Adreno GPUs.

This change allows Adreno GPUs to have multiple EGL contexts. We had
to limit this in earlier versions of Android due to limitations in
the Adreno GPU driver (only 8 EGL contexts allowed system wide.)
That brand of GPU has improved its EGL drivers to support multiple
EGL contexts in more recent versions of their drivers used on more
recent versions of Android.

Bug: 6142005
Change-Id: Id3030466be9a3d9fbe728f1785378c1f05da98fe

Author: jackpal

opengl/java/android/opengl/GLSurfaceView.java

@@ -1841,7 +1841,7 @@ public synchronized void checkGLDriver(GL10 gl) {
                         ! renderer.startsWith(kMSM7K_RENDERER_PREFIX);
                     notifyAll();
                 }
-                mLimitedGLESContexts = !mMultipleGLESContextsAllowed || renderer.startsWith(kADRENO);
+                mLimitedGLESContexts = !mMultipleGLESContextsAllowed;
                 if (LOG_SURFACE) {
                     Log.w(TAG, "checkGLDriver renderer = \"" + renderer + "\" multipleContextsAllowed = "
                         + mMultipleGLESContextsAllowed
@@ -1867,6 +1867,11 @@ private void checkGLESVersion() {
             }
         }
 
+        /**
+         * This check was required for some pre-Android-3.0 hardware. Android 3.0 provides
+         * support for hardware-accelerated views, therefore multiple EGL contexts are
+         * supported on all Android 3.0+ EGL drivers.
+         */
         private boolean mGLESVersionCheckComplete;
         private int mGLESVersion;
         private boolean mGLESDriverCheckComplete;
@@ -1875,7 +1880,6 @@ private void checkGLESVersion() {
         private static final int kGLES_20 = 0x20000;
         private static final String kMSM7K_RENDERER_PREFIX =
             "Q3Dimension MSM7500 ";
-        private static final String kADRENO = "Adreno";
         private GLThread mEglOwner;
     }