audiopolicy: engine: Add ProductStrategy common code

-Adds new Engine APIs for Product Strategy management
-Adds a common engine code to handle product strategies
-Adds a parsing configuration library to feed the strategies
-Prepare both engine for the switch

Test: make
Change-Id: I00f57ece798893bc6f9aa9ed54a3e5237e8d5cf1
diff --git a/services/audiopolicy/common/include/policy.h b/services/audiopolicy/common/include/policy.h
index 837ca47..04f1eb2 100644
--- a/services/audiopolicy/common/include/policy.h
+++ b/services/audiopolicy/common/include/policy.h
@@ -17,9 +17,21 @@
 #pragma once
 
 #include <system/audio.h>
+#include <vector>
+
+namespace android {
+
+using StreamTypeVector = std::vector<audio_stream_type_t>;
+
+
+static const audio_attributes_t defaultAttr = AUDIO_ATTRIBUTES_INITIALIZER;
+
+} // namespace android
 
 static const audio_format_t gDynamicFormat = AUDIO_FORMAT_DEFAULT;
 
+static const uint32_t SONIFICATION_RESPECTFUL_AFTER_MUSIC_DELAY = 5000;
+
 // For mixed output and inputs, the policy will use max mixer sampling rates.
 // Do not limit sampling rate otherwise
 #define SAMPLE_RATE_HZ_MAX 192000
@@ -151,3 +163,9 @@
     }
     return format1 == format2;
 }
+
+constexpr bool operator==(const audio_attributes_t &lhs, const audio_attributes_t &rhs)
+{
+    return lhs.usage == rhs.usage && lhs.content_type == rhs.content_type &&
+            lhs.flags == rhs.flags && (std::strcmp(lhs.tags, rhs.tags) == 0);
+}