Is it possible to compile and generate binary to run on x86 target emulators?
The x86 are 10 times faster that the ARM7.
Not as far as I know.
I noticed that too. Stupid slow ARM emulators… Grumble.
Best solution: Buy one or more android test devices and use real hardware. You’ll need to do this anyways to ensure you’ve properly tested. i.e. You can’t say you’ve validated your app if you didn’t run it on real hardware (iOS and Android). 
Not as far as I know.
I noticed that too. Stupid slow ARM emulators… Grumble.
Best solution: Buy one or more android test devices and use real hardware. You’ll need to do this anyways to ensure you’ve properly tested. i.e. You can’t say you’ve validated your app if you didn’t run it on real hardware (iOS and Android).