Update change log and spec for wrt-plugins-tizen_0.4.52

Update change log and spec for wrt-plugins-tizen_0.4.52

[model] REDWOOD
[binary_type] PDA
[customer] OPEN

[Issue] intensive test.
[Problem] simple absolute path was allowed for resolve api.
[Cause] no check.
[Solution] deny simple absolute path without file:// scheme.

[Bluetooth] Fix bug in getting onconnect of BluetoothHealthApplication
[Bluetooth] Use system_info_get_platform_bool()

[Application] exception should not be thrown for get/set properties

[Issue#] N/A
[Problem] The returned value has to be the biggest possible unit without losing the precision. But its unit is smaller one of two TimeDurations.
[Cause] It changed to smaller unit before calculating the differce and the result was returned.
[Solution] The result to calculate the  difference will be changed to the biggest possible unit without losing the precision.

[Issue] N/A
[Problem] loadMessageAttachment fail after loadMessageBody
[Cause] message is not set for attachments
[Solution] message set for attachments

[team] WebAPI
[request] N/A
[horizontal_expansion] N/A

UnitTC passed.