Fix findId spinning if session id is not found. *** DO NOT MERGE ***

This fix is already in master.

If session id is not found, the iterator is not incremented
such that the end() condition is reached.

The Test:
How is this bug discovered:
Calling AMediaDrm_closeSession() after AMediaDrm_provideKeyResponse()
results in spinning.

This cl is tested on nyc-mr2-dev branch using a NativeClearKeySystemTest.
After the test is run, the previous screen will be restored.

Test: ANDROID_BUILD_TOP= ./android-cts/tools/cts-tradefed run cts -m CtsMediaTestCases --test android.media.cts.NativeClearKeySystemTest#testClearKeyPlaybackCenc

bug: 32235473
Change-Id: I2bbbd8a4e92a4c926eff538a67d9719c1b6ec7d0
diff --git a/media/ndk/NdkMediaDrm.cpp b/media/ndk/NdkMediaDrm.cpp
index be71f43..166e6f1 100644
--- a/media/ndk/NdkMediaDrm.cpp
+++ b/media/ndk/NdkMediaDrm.cpp
@@ -221,8 +221,7 @@
 
 
 static bool findId(AMediaDrm *mObj, const AMediaDrmByteArray &id, List<idvec_t>::iterator &iter) {
-    iter = mObj->mIds.begin();
-    while (iter != mObj->mIds.end()) {
+    for (iter = mObj->mIds.begin(); iter != mObj->mIds.end(); ++iter) {
         if (iter->array() == id.ptr && iter->size() == id.length) {
             return true;
         }